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?

What work can one never finish?

Below rebus represent famous DiCaprio movie. Can you name it?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

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

What Word am I Looking For ?

Decode below rebus
D
N
A
T
S , D

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

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?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?