The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

What do you think with the below Picture ?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

Can you find the key in the picture below?

Find the smallest sentence with all the English alphabet.

A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

Identify the 10 differences between the two given pictures.

Count the number of triangles in the given picture.