Find the missing letter in the last circle logically in the given below picture.

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

I cannot talk, but I always reply when spoken to. What am I?

How is the moon similar to a dollar?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

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

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?