Can you replace the question mark with the correct number?

John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?

A man is shown a portrait painting. He looks closely, then tells, “Brothers and sisters have I none, but that man’s father is my father’s son!” Who is the man in the portrait?

What can you see in the middle of March and April that you can never see in any other month?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

Jack was having a candle light dinner with his girlfriend. Suddenly a cold gush of wind entered through the open window and three of the ten candles were extinguished. Assuming that none of the other candles were extinguished.

How many candles are they left with in the end ?

What Deficiency does the below rebus represent?

VIT_MIN

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

Which letter of the alphabet has the most water?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"