Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

What has many keys but can’t open a single lock?

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?