You can see it everyday, But cannot touch it at will. What is it?

A sundial has the fewest moving parts of any timepiece. Which has the most?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

why number 8549176320 is one of a kind?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?