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 does the below image rebus riddle means ?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

what does the below rebus means?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

What jumps when it walks and sits when it stands?

Move four matchsticks to the below square to form three squares?

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.