Can you count the number of matches in the picture below ?

The below mentioned letters have been placed in a order using a logic.

DEAD, BALL, FEAR, SHOP

Can you find the logic?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

What is black when you buy it, red when you use it, and gray when you throw it away?

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?

Can you find out the remainder when 3^300 is divided by 5?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

Count the number of triangles in the picture below:

What is the coolest letter in the alphabet?

Prove that twice of ten is the same as twice of eleven.