Mental Math Quiz - Grade 5
Questions and Answers
- 1.
160 ÷x = 16. So, what is x?
- A.
16
- B.
80
- C.
40
- D.
10
Correct Answer
D. 10Explanation
The correct answer is 10. To find the value of x, we need to solve the equation 160 ÷ x = 16. By dividing 160 by 16, we get x = 10.Rate this question:
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- 2.
25680 =
- A.
2 +5 +6+8+0
- B.
2 ten thousands + fifty six hundreds + eighty
- C.
25+ 68+ 0
- D.
20000+ 5000+ 600+ 80
Correct Answer
D. 20000+ 5000+ 600+ 80Explanation
The given expression represents the number 25680 in expanded form. It breaks down the number into its place values, with 2 ten thousands (20000), fifty six hundreds (5600), and eighty (80). By adding these values together, we get the correct answer of 25680.Rate this question:
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- 3.
If the cost of the three tables is 975, then the cost of 1 table is 325.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The given statement is true because if the cost of three tables is 975, dividing this cost by three will give us the cost of one table, which is 325. Therefore, the cost of one table is indeed 325.Rate this question:
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- 4.
The greatest two-digits prime number is
- A.
11
- B.
99
- C.
93
- D.
97
Correct Answer
D. 97Explanation
A prime number is a natural number greater than 1 that has exactly two distinct positive divisors: 1 and itself. The greatest two-digit prime number is 97. The other options are incorrect because they are either not prime numbers or not the greatest two-digit prime number:
11 is a prime number, but it is not the greatest two-digit prime number.
99 is not a prime number because it is divisible by 3, 9, 11, and 33.
93 is not a prime number because it is divisible by 3 and 31.Rate this question:
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- 5.
174 - 38 = _____
- A.
84
- B.
144
- C.
136
- D.
148
Correct Answer
C. 136Explanation
The correct answer is 136 because when you subtract 38 from 174, you get 136.Rate this question:
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- 6.
25/38 + 7/38 = 32/68
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The given statement is false because the sum of 25/38 and 7/38 is not equal to 32/68. To add fractions, the denominators must be the same. In this case, the denominators are already the same, so we can add the numerators to get 32/38. However, this fraction cannot be simplified to 32/68, so the answer is false.Rate this question:
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- 7.
5h 15 min after 2:45 pm is ________
Correct Answer
8 pm, 8pm, 8 p.m. , 8:00 , 8:00 PM , 8:00 pm , 8:00 PmExplanation
To find the time 5 hours and 15 minutes after 2:45 PM, follow these steps:
Add 5 hours to 2:45 PM:
2:45 PM + 5 hours = 7:45 PM
Add 15 minutes to 7:45 PM:
7:45 PM + 15 minutes = 8:00 PM
So, 5 hours and 15 minutes after 2:45 PM is 8:00 PM.Rate this question:
- 8.
6/? = 36/42. What is ?
- A.
9
- B.
8
- C.
7
- D.
6
Correct Answer
C. 7Explanation
Let’s solve the equation for ?. The equation is:
6/?=36/42
We can cross-multiply to solve for ?:
6∗42=36∗?
Solving for ? gives:
?=366∗42
So, ? equals 7.Rate this question:
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- 9.
3/4 of 100 is ________ Percent.
Correct Answer
75
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Nov 24, 2024Quiz Edited by
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Apr 04, 2020Quiz Created by
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