Why is it very easy to weigh a fish?

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?

You can see it everyday, But cannot touch it at will. What is it?

I am something people love or hate. I change peoples appearances and thoughts. If a person takes care of them self I will go up even higher. To some people I will fool them. To others I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will Never go down. What am I?

Find the next number in the following series:
6, 14, 26, 98, __?

What has 13 hearts but no other organs?

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

Akbar called Birbal and asked him to draw a line on the floor. He asked Birbal to make that line smaller without erasing it. Birbal smiled and did it before Akbar could blink his eyes.

How did he managed to do it?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?