1.
What has keys but can't open locks, has space but no room, and you can enter but can't go outside?
Correct Answer
A. A Keyboard
Explanation
A keyboard fits the riddle because it has keys (symbols), has the space button, and the enter button.
2.
You are alone in a dark, cold room; you have an oil lamp, an oil heater, and a candle; you have one match. What do you light first?
Correct Answer
D. None of the above
Explanation
In the given scenario, the critical element is the match. The riddle cleverly prompts you to light the match first before illuminating any other source, such as the oil lamp, oil heater, or candle. The answer is "None of the above," emphasizing the importance of the match as the initial step in igniting any light-producing element in the dark, cold room.
3.
Which month of the year has 28 days?
Correct Answer
D. All of the above
Explanation
All of the above is the correct answer because all months of the year have at least 28 days. However, February is the only month that can have fewer than 28 days in a non-leap year, with 28 days, and 29 days in a leap year. The other months have either 30 or 31 days.
4.
What has a head, a tail, but no body?
Correct Answer
A. A coin
Explanation
A coin has a head (the side with the person's or emblem's face) and a tail (the opposite side with a design, often an animal or symbol), but it doesn't have a body in the literal sense.
5.
I speak without a mouth and hear without ears. I have no body, but I come alive with the wind. What am I?
Correct Answer
B. Echo
Explanation
An echo is a reflection of sound that occurs when sound waves bounce off surfaces, allowing us to hear a repetition of a sound without the need for a speaker or listener in the traditional sense. The mention of "coming alive with wind" could refer to how echoes are often more pronounced in windy or open spaces where sound can travel freely.
6.
How many sides does a circle have?
Correct Answer
A. 0
Explanation
A circle doesn't have sides in the traditional sense. It is a curve with no straight edges or angles, and the concept of "sides" doesn't apply to it. A circle is often described as having one continuous boundary or one continuous curve.
7.
If you have two cups with half a cup of water in them, how many cups do you have?
Correct Answer
A. 2
Explanation
Cups! Not the measurement!
8.
How many bones does a human body have?
Correct Answer
B. 206
Explanation
The human adult body has 206 bones. These bones are divided into two main categories: the axial skeleton (which includes the skull, vertebral column, and rib cage) and the appendicular skeleton (which includes the limbs and girdles). This count can vary slightly in individuals with anatomical variations such as extra ribs or fused bones.
9.
In the periodic table, 'H' is the symbol for ________.
Correct Answer
C. Hydrogen
Explanation
The symbol 'H' in the periodic table represents the element Hydrogen. Hydrogen is the lightest and most abundant element in the universe. It has an atomic number of 1 and is located in the first group of the periodic table. Hydrogen is a colorless, odorless, and highly flammable gas. It is commonly used in various industrial processes and is also a key component of water.
10.
What is the value of Pi?
Correct Answer
C. 3.14
Explanation
Pi is a mathematical constant that represents the ratio of a circle's circumference to its diameter. It is an irrational number, meaning it cannot be expressed as a simple fraction, and its decimal representation goes on infinitely without repeating. The value of Pi is approximately 3.14, which is the correct answer given in the options.