I am a three digit number. My tens digit is twice my ones digit, my hundreds digit is twice my tens digit. I am greater than 500. Who am i?

842.

421 isn't big enough

753

We have:

I am a three digit number. My tens digit is twice my ones digit, my hundreds digit is twice my tens digit. I am greater than 500. Who am I?

How about 631?

631 is > 500.

This is a math riddle not a math question. There are several answers.

Ahh, but the ratio of

unit digit:tens digit:hundred digit
must be 1:2:4

631 does not fit that ratio

drwl's answer of 841 does, and is the only one > 500

Good point and you are right.

I did not capture that part of the question.

Good looking out, Reiny.

Thanks for the correction.

842

To find the answer, we can start by writing down the given information:

Let's say the ones digit is represented by "x".
Then the tens digit is twice the ones digit, so it would be "2x".
And the hundreds digit is twice the tens digit, so it would be "4x".

Now, we can represent the three-digit number as 4x2x.

The number is greater than 500, so we have the inequality:
4x2x > 500

Solving this inequality will give us the range of values for x, and consequently, the possible three-digit numbers.