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

0, 1, 2, 3, 4, ... are a set of ...... numbers.

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

..., -3, -2, -1, 0, 1, 2, 3, ... are a set of ..... .

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?

A set of natural numbers start with number .....

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 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?

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

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