Which Number is the odd one out?

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

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What number should come in place of the question mark below?

Which five letter word can be added at the end of below word to form a
valid word?

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This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

Who always enjoys poor health?

What does this rebus puzzle means ?

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?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.