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?

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

An inspection by the superintendent of St. Joseph School was scheduled on the next day. The class teacher Jenifer knew that he would be asking questions from her class and she would have to choose a pupil to answer. To offer a perfect impression over him, the teacher explained certain instructions to the students to maximise the chances of getting correct answer every time.

What did she say to the students?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Prove that twice of ten is the same as twice of eleven.

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

What has lots of eyes, but can’t see?

Can you find out who is the kidnapper in below Picture and why, Explain ?

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.