What number should come in place of the question mark below?
Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?
Which country gets ill every time?
If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?
How can a man go eight days without sleep?
What has 13 hearts but no other organs?
I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?
You see me once in June, twice in November, and not at all in May. What am I?
Which English verb becomes past tense just by rearranging the letters?
Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3. (You can use one number only once)
I can be cracked, made, told, and played. What am I?
In Canada, a mathematical puzzle must be solved in order to win the lottery to classify it as a “game of skill” not gambling.
