What number do you get when you multiply all of the numbers on a telephone's number pad?

Why is the Hole below a Lock?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

A new clothing store has a unique method of pricing items. A vest costs $20, a tie costs $15, a blouse costs $30, and underwear costs $45. How much would pants cost?

Find out the number of circles in the given picture having Illusion

What is full of holes but still holds water?

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?