The centre of the third figure is empty. What digit should fit inside?

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

What common phrase is represented by the below lines

Easy going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Medium going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Tough going:
Weak, 'I can't do it, I'm staying!'
Tough, 'Let's get going.'

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Find the hidden tiger in the given optical illusion ?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Who can jump higher than a Mountain?