Move three sticks of the spiral below to form a square.

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

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?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

I know a nine-letter word having only one vowel.
Do you ?

What building has the most stories?

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?