How do you go from 98 to 720 using just one letter?

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

How can you make a TV, a bed, a dog, and a car liquid?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

Give it food and it will live; give it water and it will die.