There are several books on a bookshelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

I am a three digit number. My tens digit is five more than my ones digit. My hundreds digit is eight less than my tens digit. What number am I?

A man dies of old age on his 25th birthday. How is this possible?

I am an odd number. Take away a letter and I become even. What number am I?

How can you add eight 8's to get the number 1,000? (only use addition)

A grandfather, two fathers and two sons went to the movie theater together and everyone bought one movie ticket each. How many tickets did they buy in total?

The ages of a father and son add up to 66. The father's age is the son's age reversed. How old could they be (there are 3 possible solutions)?

There are two ducks in front of two other ducks. There are two ducks behind two other ducks. There are two ducks beside two other ducks. How many ducks are there?

I asked a girl how old she was. She said, "In 2 years I will be twice as old as I was 5 years ago." How old is she?

Two fathers and two sons go fishing. Each of them catches one fish. So why do they bring home only three fish?

If you multiply this number by any other number, the answer will always be the same. What number is this?

What 3 positive numbers give the same result when multiplied together as when added together?

Arrange four nines to make it equal to 100.