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

Through your logical capabilities, can you make 7 an even?

Solve the puzzle by telling what does below picture means.

Which tank will fill first?

I have eight fingers and two thumbs but I do not live. What Am I?

How many Watermelons are there in the below picture?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

If six children and two dogs were under an umbrella, how come none of them got wet?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

Can you replace the question mark with the correct number?