If 3 cats can kill 3 rats in 3 minutes, how long will it take 100 cats to kill 100 rats?

### There is a three digit number

There is a three digit number. The second digit is four times as big as the third digit, while the first digit is three less than the second digit. What is the number?

### Why are 1999 ten pound notes worth more than 1993

Why are 1999 ten pound notes worth more than 1993 ten pound notes?

### How many fingers are there on 10 hands?

Take a good look at your hands. You have 10 fingers on your hands. How many fingers are there on 10 hands?

### What number do you get

What number do you get when you multiply all of the numbers on a telephone’s number pad?

### When is 99 more than 100

### 30 cows and 28 chickens

There are 30 cows in a field, and 28 chickens. How many didn’t?

### How many times can you subtract 10 from 100

How many times can you subtract 10 from 100?

### You start with 1000 then add 40

You start with 1000 then add 40 add another 1000 then add 30 add another 1000 then add 20 add one more 1000 then add 10 what is your answer?

### Add two to eleven and get one

When can you add two to eleven and get one as the correct answer?