Which Number is the odd one out?

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

I can write cow in 13 letters.

Can You?

Kareena is older than Katrina and younger than Karishma. Isabelle is younger than Bipasha and Karishma. Bipasha is older than Karishma. If Kareena and Isabelle are the same age, who's the youngest?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Can you place three balls such that the equation shown in the picture holds true?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

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

Different lights make me strange by changing me into different sizes. What am I?