How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Who is that with a neck and no head, two arms and no hands? What is it?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

What breaks yet never falls, and what falls yet never breaks?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

What does this rebus puzzle means ?

Find the missing number in the series below

13 -21 34 -55 ? -144

John gave half of the apples he had plus one more to Jacob. He gave half of the remaining ones plus one more to James. Now, John was left with just one apple.

Can you find out how many did he have in the beginning?