Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

What is the next number in this series?

4,12,84,3612....

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

In a picnic session, a footballer was practicing. During his play, he busted lips and ears and broke ribs and thighs. However, he was still able to play a professional match on the very next day.



How can this be possible?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

How many triangles can you find in this given picture?

What makes this number unique: 8,549,176,320?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

Which is the smallest number that you can write using all the vowels exactly once?