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

I am the fastest animal but cannot climb the tree. What am I?

A man dies of old age on his 25 birthday. How is this possible?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

Name a key which is hardest to turn.