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.

Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.

Find the next number in the series below

21 32 54 87 131 ?

What does below chemistry rebus means?

If a wheel has 54 spokes, how many spaces are there between the spokes?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

What is wrong in the below Picture?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

The centre of the third figure is empty. What digit should fit inside?