Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

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?

There was a blind beggar living on the footpath of a street. Suddenly one day, the beggar's brother died. What was the relation of the blind beggar with the person who died?

PS: Brother is not the answer.

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

Can you write down eight eights so that they add up to one thousand?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

Can you find the key in the picture below?