You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Find The Odd One Out

1. FLOW
2. SNIP
3. TRAP
4. DRAW
5. BACK

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?