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

If we tie a Sheep to one peg, a circled grass is been eaten by the Sheep. If we tie the Sheep to two pegs with a circle on its neck, then an eclipse is eaten out of the grass by the Sheep. If we want an eclipse then we put two pegs and then put a rope in between them and the other end of the rope is tied up on the Sheep's neck.

How should we tie the peg and the Sheep so that a square is eaten out from the garden grass? We only have one Sheep rope and the peg and the rings.

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

What has many teeth, but cannot bite?

Wednesday, Steve and Pam go to a restaurant to eat lunch. After eating lunch, they pay the bill. But Steve and Pam do not pay the bill. So…who does?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?