Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

10+10 and 11+11 can give you the same answer.

Explain how?

What does this say?

XLR8

Which is Odd One Out and why?

4377

3954

9862

8454

9831

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

I add 5 to 9 and get 2. The answer is correct, so what am I?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?

Can you solve the photo plexer logic ?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?