Which number should replace the question mark?

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

What does below Rebus mean ?

esgg sgeg gegs gsge

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?

Can you find out who is the kidnapper in below Picture and why, Explain ?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

By using 'because' continuously three times, can you make an English statement ?

What does this simple rebus mean?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

A car key is hidden in the picture. Can you spot it.? Quickly test your eye power now!