There are forty elephants and they have forty-fore heads. How can this be possible?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

People make me, save me, change me, raise me. What am I?

What is the Surname of Barbie Doll?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

What is 3/7 chicken, 2/3 cat and 2/4 goat?

I am lying and I always lie. Tell me whether I am lying or telling the truth.