I am an odd number. Take away a letter and I become even. What number am I?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Solve the equation in the image by looking at the pattern closely.

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