Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Find the last number in the series below:

voN luJ yaM raM ---

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

What goes up but never comes down?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

What Deficiency does the below rebus represent?

VIT_MIN

I have teeth but i don't bite. Who Am I ?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?