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 has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Which number comes next in the number series?

2, 9, 30, 93, ?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

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

AB * C = DE - F = GH / I

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?