What is the riddle which can be asked all day with a different correct answer each time.

Identify the 10 differences between the two given pictures.

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

Which is heavier: a ton of bricks or a ton of feathers?

Which is faster, Heat or Cold ? Explain.

What does it mean?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

By using all numbers, i.e. 123456789 and subtraction/addition, operators number 100 can be formed in many ways.
Example: 98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition use of the number 32 is a must. Then there are limited solutions.
One of such solution is: 9 - 8 + 76 + 54 - 32 + 1 = 100

Can you tell me any other solution?