On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

I know a nine-letter word having only one vowel.
Do you ?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Can you find the company name in the pictogram below?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?