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 fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

What is more useful when it is broken?

Replace the question mark with the number below given a simple math problem.

What does below Rebus say?

XLR8

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

Which wheel of car does not rotate when you turn your car right?

There are three boxes. One is labeled "APPLES" another is labeled "ORANGES". The last one is labeled "APPLES AND ORANGES". You know that each is labeled incorrectly. You may ask me to pick one fruit from one box which you choose.

How can you label the boxes correctly?