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

There are 3 apples in the basket and you take away 2. How many apples do you have now?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

John went to buy some expensive, foreign chocolates. He only had Rs 100 with him. When he reached the shop, he got out and know that on those chocolates, there was a 15% import duty and 5% VAT.

How much worth chocolate should he buy so that he can accommodate it in Rs 100?

Mr Black, Mr Gray, and Mr White are fighting in a truel. They each get a gun and take turns shooting at each other until only one person is left. Mr Black, who hits his shot 1/3 of the time, gets to shoot first. Mr Gray, who hits his shot 2/3 of the time, gets to shoot next, assuming he is still alive. Mr White, who hits his shot all the time, shoots next, assuming he is also alive. The cycle repeats. If you are Mr Black, where should you shoot first for the highest chance of survival?

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 is the below Rebus indicate?

Can you solve this picture maths equation?

You need to remove two matchsticks to make the below equation true. Can you do it ?

What number comes next in this sequence:
7 8 5 5 3 4 4 _