If 21x = 79x, what is the value of x?

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

Our product and our sum always give the same answer. Who are we?

John went to buy some expensive, foreign chocolates. He only had Rs 100 with him. When he reached the shop, he got out and know that on those chocolates, there was a 15% import duty and 5% VAT.

How much worth chocolate should he buy so that he can accommodate it in Rs 100?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

All of Jacob's shoes are red except two.
All of Jacob's shoes are green except two.
All of Jacob's shoes are yellow except two.

How many shoes does Jacob have?

You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:

Green Balls costing $6
Yellow Balls costing $3
Black Balls costing $0.10

Now, how many of each must you buy to fulfil the condition given?