Fun Math Time

Here's a list of numbers.

Code:

100; 125; 128; 160; 200; 250; 256; 320; 400; 500

What's the next number? What was the number before 100?
All numbers in this sequence are real, positive numbers. the sequence is always increasing, there is a finite amount of numbers in the list, 100 is not the start.

Go.

575 is next, and the number before 100 was....50?

Both are wrong, but I realize why this is a lot easier than I meant it to be. D:

Both are wrong, but I realize why this is a lot easier than I meant it to be. D:

Correction, 625 is next (500 / .8)

before 100, it is 80. (100 ^ .8)

Sequence is .8>.9765625>.8>.8>.8>.9765625 repeated.

625's off, but 80's right. o-o

Are you sure? seems right to me following the sequence, unless im doing the math for the final number wrong.

512 is next.
80 is before 100.
The fail in this thread makes me laugh.

NVM, its 600 even, sequence is now +25+3+32+40 (time 2 to continue)

Fudge, i missed a number, 512 is correct (6x2=12+500)

NVM, its 600 even, sequence is now +25+3+32+40 (time 2 to continue)

Wut @ randomly removing me image.

Wait, is 600 right? a_@ I know the sequence is for sure. Gah i fucking hate math (and a statistics class is heading my way >_>)

80 and 512, was expectign something harder.

80 and 512, was expectign something harder.

It could have been, its a basic sequence, with the only real challenge being the x2 part.

If there was more variation in how the sequence progressed, it can be harder.

If you want a challenge, tell me the first and last numbers in the sequence.

Well, the sequence is all numbers 2^m * 5^n, but there's nothing to indicate where it starts or ends. I would assume that the first is 1. Maybe the last is 100000000?

the sequence is just taking a few numbers as "start" say 100, 125, 128, 160 and the next four numbers will be the double of those numbers: 200, 250, 256, 320. and repeating.

There is no reason for the sequence to be limited.

Maybe the last is 100000000?

Wut.
I got the sequence from a list of factors of 1,000,000,000 that I found via my calculator + lonely lunch. Should I check my room for bugs?