What does does this rebus picture means ?

What is at the end of a rainbow?

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?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

Count the number of triangles in the picture below:

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

How many letters are in the alphabet?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?