Add me to myself and multiply by 4. Divide me by 8 and you will have me once more. What number am I?

Answer: any number

More Math Riddles with answers

More Math Riddles

Adored by few, Feared and hated by many. Mistress of the entire universal reason, Master in the art of numbers. Some may have solved many of your mysteries, But there still much of them to find. What are they?
An apple is 40 cents, a banana is 60 cents and a grapefruit is 80 cents. How much is a pear?
An officer wishing to arrange his men in a solid square found by his first arrangement that he had 39 men left over. He then started increasing the number of men on a side by one, but found that 50 additional men would be needed to complete a new square. How many men did the officer have?
At a children's party, 10 kids had juice, 8 kids had cake, and 6 kids had juice and cake. How many kids were there at the party?
Can you arrange four nines to make it equal to 100.
David is throwing Robert a surprise birthday party but he has to stay within his budget. He spent half of his money plus $2.00 on the cake. Half of what he had left plus $2.00 was spent on balloons and streamers. Then he spent half of what he had left plus $1.00 on candy. Now he is out of money, how much did he start with?
Dean Sam and Castiel are three brothers. Interestingly their current age is prime. What's more interesting that difference between their ages is also prime. How old are they?
Divide 20 by half and add 30, what do you get?
Double my number, I'm less than a score. Half of my number is less than four. Add one to my double when bakers are near. Days of the week are still greater, I fear.
Edward is as old as Benjamin used to be when Edward was as old as Benjamn is now. Benjamin is 36. How old is Edward?
Eggs are $0.12 a dozen. How many eggs can you get for a dollar?
Farmer Brown came to town with some watermelons. He sold half of them plus half a melon, and found that he had one whole melon left. How many melons did he take to town?