Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Can you find a five letter word that is left with only two letters if one is removed?

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

My location can be determined by the below rebus.
So where am i ?

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

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

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

A B C D E F G H

These are the letters given to you. Now you have to find out the letter that comes two to the right of the letter which is immediately to the left of the letter that comes three to the right of the letter that comes midway between the letter two to the left of the letter C and the letter immediately to the right of the letter F.

I travel all around the world but always stay in the corner. What am I?