There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

There is an exact a week gap between Christmas and New Year. Hence, It is obvious that the new year that comes right after Christmas comes on the same day of the week.

A Strange thing happened in the Year 1777. Christmas occurs on Wednesday and New Year on Monday. How is that possible?

John was piloting a plane behind a car but was never able to overtake it. Why?

Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Can you count the number of triangles inside a triangle?