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

John is on an island and there are three crates of fruit that have washed up in front of him. One crate contains only apples. One crate contains only oranges. The other crate contains both apples and oranges.

Each crate is labelled. One reads 'apples', one reads 'oranges', and one reads 'apples and oranges'. He know that NONE of the crates have been labeled correctly - they are all wrong.

If he can only take out and look at just one of the pieces of fruit from just one of the crates, how can he label all of the crates correctly?

If 1+9+8=1, what is 2+8+9?

Can you make a fire with just a single stick?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

Our product and our sum always give the same answer. Who are we?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

What can you catch but never throw?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?