You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

What number should come in place of the question mark below?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Replace the question mark with the number below given a simple math problem.

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?