What is the coolest letter in the alphabet?

How many triangles can you count in the figure given?

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.

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

What Deficiency does the below rebus represent?

VIT_MIN

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

The more of this there is, the less you see. What is it?