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

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Which digit occurred maximum times between the number 1 and 1000?

I have branches, but no fruit, trunk or leaves. What am I?

In the image below, can you find the value of an angle(y)

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

What do the following words have in common?

Assess
Banana
Dresser
Grammar
Potato
Revive
Uneven
Voodoo

Four children having five rocks each were playing a game in which they had to throw the rock at a particular solid area in the water. Child 1- Succeeded in throwing three rocks at a solid area but one of the rocks sunk. Child 3 - His aim was so bad that all rocks got sunk. Child 4- He was awesome and none of the rocks got sunk. Child 2 - Was the winner but was struck by a rock in the head and died. Who killed Child 2?

What brings you down but never up?