Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

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 find out the remainder when 3^300 is divided by 5?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

What is the word or phrase below?
R | E | A | D

You bought me for dinner but never eat me. What am I?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

I am an odd number. Take away a letter and I become even. What number am I?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?