Mathematics Jss 1 Lagos State Ministry Of Education (Edvi)
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- 1.
Find the common factors of 15 and 20.
- A.
(A) 1, 5
- B.
(B) 1, 3
- C.
(C) 1, 2
- D.
(D) 1, 4
Correct Answer
A. (A) 1, 5Explanation
The common factors of 15 and 20 are the numbers that can divide both 15 and 20 without leaving a remainder. The factors of 15 are 1, 3, 5, and 15. The factors of 20 are 1, 2, 4, 5, 10, and 20. The common factors of 15 and 20 are 1 and 5, as they are the only numbers that can divide both 15 and 20 without leaving a remainder.Rate this question:
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- 2.
Find the HCF of 9, 15, and 24.
- A.
(A) 2
- B.
(B) 6
- C.
(C) 3
- D.
(D) 7
Correct Answer
C. (C) 3Explanation
The HCF (Highest Common Factor) of 9, 15, and 24 is 3. This is because 3 is the largest number that can divide evenly into all three numbers. 9 can be divided by 3 to give 3, 15 can be divided by 3 to give 5, and 24 can be divided by 3 to give 8. Therefore, 3 is the highest common factor of all three numbers.Rate this question:
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- 3.
Write in words 1,347,000
- A.
(A) one million four hundred and forty-seven thousand
- B.
(B) one million three hundred and forty-seven thousand
- C.
(C) one million seven hundred and thirty-four thousand
- D.
(D) one thousand three and forty-seven
Correct Answer
B. (B) one million three hundred and forty-seven thousandExplanation
The correct answer is (B) one million three hundred and forty-seven thousand. This is because the number 1,347,000 can be written as "one million three hundred and forty-seven thousand", which matches option (B).Rate this question:
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- 4.
Find the LCM of 20, 24, and 30
- A.
(A) 120
- B.
(B) 40
- C.
(C) 60
- D.
(D) 74
Correct Answer
A. (A) 120Explanation
To find the LCM (Least Common Multiple) of 20, 24, and 30, we need to find the smallest number that is divisible by all three numbers. We can start by finding the prime factors of each number: 20 = 2^2 * 5, 24 = 2^3 * 3, and 30 = 2 * 3 * 5. Then, we take the highest power of each prime factor: 2^3 * 3 * 5 = 120. Therefore, the LCM of 20, 24, and 30 is 120.Rate this question:
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- 5.
Find the sum of 695 and 455 and then divide the result by the difference between 39 and 34.
- A.
(A) 245
- B.
(B) 230
- C.
(C) 259
- D.
(D) 247
Correct Answer
B. (B) 230Explanation
To find the sum of 695 and 455, we add them together: 695 + 455 = 1150.
Then, we find the difference between 39 and 34: 39 - 34 = 5.
Finally, we divide the sum (1150) by the difference (5): 1150 / 5 = 230.
Therefore, the correct answer is (B) 230.Rate this question:
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- 6.
Multiply 13/5 and 13/18
- A.
(A) 13/14
- B.
(B) 14/17
- C.
(C) 169/90
- D.
(D) 45/52
Correct Answer
C. (C) 169/90 -
- 7.
The 5th multiple of 6 is ……
- A.
(A) 36
- B.
(B) 18
- C.
(C) 30
- D.
(D) 24
Correct Answer
C. (C) 30Explanation
The 5th multiple of 6 can be found by multiplying 6 by 5, which equals 30. Therefore, the correct answer is (C) 30.Rate this question:
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- 8.
Find the sum of 29.34 and 837.5
- A.
(A) 1020.9
- B.
(B) 867.84
- C.
(C) 1030.9
- D.
(D) 866.84
Correct Answer
D. (D) 866.84Explanation
The correct answer is (D) 866.84. To find the sum of 29.34 and 837.5, you need to add the two numbers together. Adding the decimal parts, 0.34 and 0.50, gives you 0.84. Adding the whole numbers, 29 and 837, gives you 866. Combining the two results, the sum is 866.84.Rate this question:
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- 9.
Express 84 as a product of prime factors
- A.
(A) 2 x 2 x 7
- B.
(B) 2 x 2 x 3 x 7
- C.
(C) 2 x 3 x 3 x 7
- D.
(D) 2 x 3 x 7
Correct Answer
B. (B) 2 x 2 x 3 x 7Explanation
The number 84 can be expressed as a product of prime factors by repeatedly dividing it by prime numbers. Starting with the smallest prime number, 2, we divide 84 by 2 to get 42. We continue dividing 42 by 2 to get 21, and then divide 21 by 3 to get 7. Finally, we divide 7 by itself to get 1. Therefore, the prime factorization of 84 is 2 x 2 x 3 x 7.Rate this question:
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- 10.
Add up 315 and 231
- A.
(A) 456
- B.
(B) 465
- C.
(C) 564
- D.
(D) 546
Correct Answer
D. (D) 546Explanation
The correct answer is (D) 546. To find the sum of 315 and 231, you add the hundreds place, the tens place, and the ones place separately. In the hundreds place, 3 + 2 equals 5. In the tens place, 1 + 3 equals 4. In the ones place, 5 + 1 equals 6. Therefore, the sum of 315 and 231 is 546.Rate this question:
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- 11.
Which one of these numbers is not a common factor of 12 and 24?
- A.
(A) 5
- B.
(B) 2
- C.
(C) 4
- D.
(D) 3
Correct Answer
A. (A) 5Explanation
The number 5 is not a common factor of 12 and 24 because it does not divide evenly into either of them. The factors of 12 are 1, 2, 3, 4, 6, and 12, while the factors of 24 are 1, 2, 3, 4, 6, 8, 12, and 24. Therefore, the correct answer is (A) 5.Rate this question:
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- 12.
Change to decimal 3/8
- A.
(A) 0.573
- B.
(B) 0.753
- C.
(C) 0.375
- D.
(D) 0.537
Correct Answer
C. (C) 0.375Explanation
To change a fraction to a decimal, divide the numerator (top number) by the denominator (bottom number). In this case, dividing 3 by 8 gives 0.375. Therefore, the correct answer is (C) 0.375.Rate this question:
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- 13.
Evaluate 3 2/5 + 2 2/3
- A.
(A) 15 1/5
- B.
(B) 5 16/15
- C.
(C) 5 5/16
- D.
(D) 6 1/15
Correct Answer
D. (D) 6 1/15Explanation
To evaluate the given expression, we need to convert the mixed numbers into improper fractions. 3 2/5 can be written as (3*5 + 2)/5 = 17/5. 2 2/3 can be written as (2*3 + 2)/3 = 8/3. Now, we can add the fractions: (17/5) + (8/3). To add fractions with different denominators, we need to find a common denominator. In this case, the common denominator is 15. Converting both fractions to have a denominator of 15, we get: (17/5) * (3/3) = 51/15 (8/3) * (5/5) = 40/15 Adding the fractions: (51/15) + (40/15) = 91/15. Now, we can convert the improper fraction back into a mixed number: 91 ÷ 15 = 6 remainder 1. Therefore, the answer is 6 1/15, which matches option (D).Rate this question:
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- 14.
What is the value of 1 ½ X 2 1/3
- A.
(A) 4 1/3
- B.
(B) 3 ½
- C.
(C) 5 1/3
- D.
(D) 4 ½
Correct Answer
B. (B) 3 ½ -
- 15.
Find the common factors of 15 and 20.
- A.
(A) 1, 5
- B.
(B) 1, 3
- C.
(C) 1, 2
- D.
(D) 1, 4
Correct Answer
A. (A) 1, 5Explanation
The common factors of 15 and 20 are numbers that can divide both 15 and 20 without leaving a remainder. The numbers 1 and 5 are the only numbers that can divide both 15 and 20. Therefore, the correct answer is (A) 1, 5.Rate this question:
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- 16.
10/3 is a fraction called …..
- A.
(A) proper fraction
- B.
(B) improper fraction
- C.
(C) equivalent fraction
- D.
(D) mixed fraction
Correct Answer
B. (B) improper fractionExplanation
An improper fraction is a fraction where the numerator is greater than or equal to the denominator. In this case, 10/3 is an improper fraction because the numerator (10) is greater than the denominator (3).Rate this question:
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- 17.
MCM in numeral stands for ……
- A.
(A) 2100
- B.
(B) 2000
- C.
(C) 1800
- D.
(D) 1900
Correct Answer
D. (D) 1900Explanation
MCM in numeral stands for "Mille Cent" which is the representation of the number 1900 in Roman numerals.Rate this question:
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- 18.
Add the following 1.23 + 10.23 + 100.23
- A.
(A) 3.2553
- B.
(B) 111.69
- C.
(C) 325.53
- D.
(D) 11.169
Correct Answer
B. (B) 111.69Explanation
The correct answer is (B) 111.69. To find the sum of 1.23 + 10.23 + 100.23, we simply add the three numbers together. 1.23 + 10.23 equals 11.46, and adding 100.23 to that gives us a total of 111.69. Therefore, the answer is 111.69.Rate this question:
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- 19.
Ch Change to mixed fraction 14/9
- A.
(A)14/9
- B.
(B) 15/9
- C.
(C) 91/5
- D.
(D) 51/9
Correct Answer
B. (B) 15/9 -
- 20.
Write as decimal 4/8
- A.
(A) 0.357
- B.
(B) 0.377
- C.
(C) 0.375
- D.
(D) 0.5
Correct Answer
D. (D) 0.5Explanation
The fraction 4/8 can be simplified to 1/2. When written as a decimal, 1/2 is equal to 0.5.Rate this question:
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- 21.
Express 5/7 as an equivalent fraction
- A.
(A) 10/14
- B.
(B) 6/7
- C.
(C) 7/14
- D.
(D) 4/7
Correct Answer
A. (A) 10/14Explanation
To express 5/7 as an equivalent fraction, we need to find a fraction that has the same value but with a different numerator and denominator. To do this, we can multiply both the numerator and denominator of 5/7 by the same number. In this case, we can multiply both by 2 to get 10/14. Therefore, the correct answer is (A) 10/14.Rate this question:
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- 22.
I In a leap year, the month of February has ……….. days
- A.
(A) 31
- B.
(B)29
- C.
(C) 30
- D.
(D) 28
Correct Answer
B. (B)29Explanation
In a leap year, the month of February has 29 days. A leap year occurs every 4 years and has an extra day added to the calendar to keep it synchronized with the solar year. This extra day is added to the month of February, making it 29 days instead of the usual 28 days. Therefore, the correct answer is (B) 29.Rate this question:
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- 23.
Convert 0.88 to percentage
- A.
(A) 88%
- B.
(B) 0.8%
- C.
(C) 8.8%
- D.
(D) 0.88%
Correct Answer
A. (A) 88%Explanation
To convert a decimal number to a percentage, you need to multiply it by 100. In this case, 0.88 multiplied by 100 equals 88. Therefore, the correct answer is (A) 88%.Rate this question:
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- 24.
Write in words 30,212,150,615
- A.
(A) thirty thousand two hundred and twelve hundred one hundred and fifty thousand six hundred and fifteen.
- B.
(B) thirty million two hundred and twelve thousand one hundred and fifty hundred and six fifteen.
- C.
(C) thirty billion two hundred and twelve million one hundred and fifty thousand six hundred and fifteen
- D.
(D) thirty million two hundred and two thousand one five zero six fifteen.
Correct Answer
C. (C) thirty billion two hundred and twelve million one hundred and fifty thousand six hundred and fifteenExplanation
The correct answer is (C) thirty billion two hundred and twelve million one hundred and fifty thousand six hundred and fifteen. This is the correct representation of the number 30,212,150,615 in words, following the standard rules of place value and number naming.Rate this question:
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- 25.
Put the following in its lowest term 125/240
- A.
25/48
- B.
120/420
- C.
48/25
- D.
25/58
Correct Answer
A. 25/48Explanation
To find the lowest term of a fraction, we need to divide both the numerator and the denominator by their greatest common divisor (GCD). In this case, the GCD of 125 and 240 is 5. Dividing both numbers by 5, we get 25/48. Therefore, the correct answer is 25/48.Rate this question:
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- 26.
Which of the following is a pure number?
- A.
(A) 12^7
- B.
(B) 31
- C.
(C) 6^5
- D.
(D) 49^3
Correct Answer
B. (B) 31Explanation
A pure number is a number without any associated units. It's simply a numerical value.
Among the given options:
Option (B) 31 is a pure number.
Option (A) 12^7, Option (C) 6^5, and Option (D) 49^3 are not pure numbers since they represent numbers raised to a power.
So, the correct answer is: (B) 31Rate this question:
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- 27.
Find the difference between 25.00015 and 19.6025
- A.
(A) 5.39765
- B.
(B) 5.94675
- C.
(C) 5.5764
- D.
(D)5.94657
Correct Answer
A. (A) 5.39765Explanation
The correct answer is (A) 5.39765. To find the difference between 25.00015 and 19.6025, subtract 19.6025 from 25.00015. This gives us 5.39765. Therefore, the difference is 5.39765.Rate this question:
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- 28.
What is the place value of 8 in 238056
- A.
(A) 80
- B.
(B) 8
- C.
(C) 800
- D.
(D) 8000
Correct Answer
D. (D) 8000Explanation
The place value of a digit in a number is determined by its position in the number. In the given number, 238056, the digit 8 is in the thousands place. Therefore, its place value is 8000.Rate this question:
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- 29.
Write the number in words: 4510015
- A.
(A) four hundred thousand five hundred and ten and fifteen
- B.
(B) four million five hundred and ten thousand and fifteen
- C.
(C) forty-five million ten thousand and fifteen
- D.
(D) forty-five and ten thousand and fifteen
Correct Answer
B. (B) four million five hundred and ten thousand and fifteenExplanation
The correct answer is (B) four million five hundred and ten thousand and fifteen. This is because the number 4510015 can be broken down into four million (4,000,000), five hundred and ten thousand (510,000), and fifteen (15).Rate this question:
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- 30.
Write as improper fraction 22/3
- A.
(A) 7 1/3
- B.
(B) 8 2/3
- C.
(C) 4 2/3
- D.
(D) 6 1/3
Correct Answer
A. (A) 7 1/3Explanation
The given fraction is 22/3. To write it as an improper fraction, we divide the numerator (22) by the denominator (3). 22 divided by 3 equals 7 with a remainder of 1. So, the improper fraction is 7 1/3.Rate this question:
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- 31.
An integer is any positive or negative numeral True/False
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
An integer is any positive or negative numeral, which means it can be a whole number that is either positive or negative. Therefore, the statement "An integer is any positive or negative numeral" is true.Rate this question:
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- 32.
Wh Which is the greatest in the following -19, -7, +4, +3, -5.
- A.
(a) -19
- B.
(b) -7
- C.
(c) +4
- D.
(d) +3
Correct Answer
C. (c) +4Explanation
The greatest number among the given options is +4. When comparing negative numbers with positive numbers, the positive numbers are always greater. Therefore, +4 is greater than -19, -7, +3, and -5.Rate this question:
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- 33.
Express 23.725 correct to the nearest whole number
- A.
(a) 2.38
- B.
(b) 237
- C.
(c) 24
- D.
(d) 23
Correct Answer
C. (c) 24Explanation
The question asks to express 23.725 to the nearest whole number. To do this, we look at the decimal part of the number. Since the decimal part is greater than 0.5, we round up the whole number to the next higher number, which is 24. Therefore, the correct answer is (c) 24.Rate this question:
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- 34.
Find the value of (+3) – (+7)
- A.
(a) -4
- B.
(b) -10
- C.
(c) +7
- D.
(d) +3
Correct Answer
A. (a) -4Explanation
The given expression is (+3) - (+7). When subtracting a positive number from another positive number, we can think of it as adding the opposite of the second number. So, (+3) - (+7) can be rewritten as (+3) + (-7). Adding 3 to the opposite of 7 gives us -4. Therefore, the value of (+3) - (+7) is -4.Rate this question:
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- 35.
Simplify 6 + 1 + (-4)
- A.
(a) +3
- B.
(b) -5
- C.
(c) -3
- D.
(d) +4
Correct Answer
A. (a) +3Explanation
The given expression can be simplified by adding the numbers together. 6 + 1 = 7, and then adding -4 to 7 gives us 3. Therefore, the simplified form of the expression is +3, which is the correct answer.Rate this question:
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- 36.
Simplify - 14a 7
- A.
-2a
- B.
(b) 7a
- C.
(c) 2a
Correct Answer
A. -2aExplanation
To simplify the expression negative fourteen a over seven, divide the coefficient negative fourteen by seven. This results in negative two. The variable 'a' remains unchanged. So, the simplified expression is negative two a.Rate this question:
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- 37.
Convert 92% to fraction
- A.
(a) 29/50
- B.
(b) 23/25
- C.
(c) 32/52
- D.
(d) 92/5
Correct Answer
B. (b) 23/25Explanation
To convert a percentage to a fraction, we divide the percentage by 100 and simplify the fraction if possible. In this case, we divide 92 by 100 to get 0.92. Since 92 and 100 have a common factor of 4, we can simplify the fraction by dividing both the numerator and denominator by 4. This gives us 23/25, which is the equivalent fraction for 92%. Therefore, the correct answer is (b) 23/25.Rate this question:
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- 38.
Simplify (-4a) x (+3b)
- A.
(a) -12ab
- B.
(b) -7ab
- C.
(c) -4a
- D.
(d) -3a
Correct Answer
A. (a) -12abExplanation
The given expression (-4a) x (+3b) represents the product of -4a and +3b. To find the product, we multiply the coefficients (-4 and +3) and the variables (a and b) separately. The product of -4 and +3 is -12. The variables a and b are both present in the expression, so we include them in the product. Therefore, the simplified form of the expression is -12ab, which matches option (a).Rate this question:
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- 39.
Which is greatest 34 or 24 ?
- A.
(a) 24
- B.
(b) 25
- C.
(c) 33
- D.
(d) 34
Correct Answer
D. (d) 34Explanation
In this question, we are asked to determine which number is greater between 34 and 24. The number 34 is greater than 24, so the correct answer is 34.Rate this question:
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- 40.
Express correct 14.467 to 2 decimal places
- A.
(a) 14.5
- B.
(b) 14.4
- C.
(c) 14.47
- D.
(d) 14.467
Correct Answer
C. (c) 14.47Explanation
The correct answer is (c) 14.47. When expressing a number to 2 decimal places, we round the number to the nearest hundredth. In this case, 14.467 is closer to 14.47 than it is to 14.46, so we round up to 14.47.Rate this question:
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- 41.
Find the value of +72 + (-168)
- A.
(a) +36
- B.
(b) +72
- C.
(c) -72
- D.
(d) -96
Correct Answer
D. (d) -96Explanation
The given expression is +72 + (-168). When we add a positive number and a negative number, we subtract the absolute value of the smaller number from the absolute value of the larger number and keep the sign of the larger number. In this case, the absolute value of -168 is larger than the absolute value of +72. So, we subtract 168 from 72 and keep the negative sign, resulting in -96.Rate this question:
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