What word begins and ends with an E, but has only one letter?

Decode below rebus
D
N
A
T
S , D

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

Before Mount Everest was discovered, what was the highest mountain in the world?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

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?

A cricket has 6 legs, a squirrel has 4 legs and a spider has 8 legs.

In a local zoo, it was found that the total number of legs is 612. Also, there are equal number of each of the above animals/insects.

Can you find out how many animals are there in the zoo?

What is the below Rebus indicate?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

Can you find the thief by just looking at the picture below?