Can you count the number of quadrilaterals in the picture below?

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

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?

Can you find the odd one out from the below words ?

First Second Third Forth Fifth Sixth Seventh, Eighth Nine Ten Eleven Twelve.

Can you write down eight eights so that they add up to one thousand?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Which is faster, Heat or Cold ? Explain.

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?