I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Jim has three close friends at his school: Michael, John and Alice. Two of them play football, two play basketball and two play hockey. The friend who does not play hockey does not play basketball as well. The friend who does not play football does not play hockey.

Can you identify which sport/s is played by which person?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

There is a jar in which there are two types of candies.
20 blueberries and 16 strawberries. You perform the following steps:
1) You take out two candies.
2) If the two candies are of the same flavour, you add a blueberry one otherwise, you add the strawberry one.

You repeat these two steps till there is just one candy remaining in the jar. Which flavoured candy will be left?

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

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