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. 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 ten pound notes?
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 when you multiply all of the numbers on a telephone’s number pad?