If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

You need to arrange three 7 and mathematical symbols to form number 1?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

Four friends are sitting on a tree. Each one of them is wearing a hat. They don't know which coloured hat are they wearing but they do know that two of them have green hats and two of them have orange hats.

Adam is sitting on the top branch and he can see the hats of Billy and Cyrus. Billy is sitting on a branch above Cyrus and he can see Cyrus hat. Duke is sitting at the base of the tree. Branches are covering him fully and no one can see his hat.

Now they are not allowed to look upwards. Who do you think will shout the colour of his hat first?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Out of four images which one is the odd one out?

All of Jacob's shoes are red except two.
All of Jacob's shoes are green except two.
All of Jacob's shoes are yellow except two.

How many shoes does Jacob have?

How can you leave a room with two legs and return with six legs?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?