If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

What brings you down but never up?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

Why is the Hole below a Lock?

What Time Should the last watch show in the below figure?

Who is that with a neck and no head, two arms and no hands? What is it?

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?