what does the below rebus means?

Count the Triangle in the figure given below:

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

What can you deduce from the following BrainBat?

CRY
LMKI

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?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700

Here is a Swiss Cross. You have to make two straight cuts in the figure so that it is divided into four congruent pieces. Also, you should be able to join these pieces into a square then. Can you accept this challenge?

What is the word or phrase?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?