the question can be stated in another way like this.."how many numbers are divisible by five within 1000-9999"
if so, then just use arithmetic progression to get how many numbers are divisible by five..thus,
9995=1005+(n-1)(5),
n=1799, then answer is..
9000-1799=7201

Easy Math Editor

`*italics*`

or`_italics_`

italics`**bold**`

or`__bold__`

boldNote: you must add a full line of space before and after lists for them to show up correctlyparagraph 1

paragraph 2

`[example link](https://brilliant.org)`

`> This is a quote`

Remember to wrap math in \( ... \) or \[ ... \] to ensure proper formatting.`2 \times 3`

`2^{34}`

`a_{i-1}`

`\frac{2}{3}`

`\sqrt{2}`

`\sum_{i=1}^3`

`\sin \theta`

`\boxed{123}`

## Comments

Sort by:

TopNewestThe thousands digit can only be 1,2,3,4,6,7,8,9 = 8 digits. Hundreds digits: 9 Tens digits: 9 Ones digit: 9 8 x 9 x 9 x 9 = 5832. I think...

Log in to reply

the question can be stated in another way like this.."how many numbers are divisible by five within 1000-9999" if so, then just use arithmetic progression to get how many numbers are divisible by five..thus, 9995=1005+(n-1)(5), n=1799, then answer is.. 9000-1799=7201

Log in to reply

What about 5554? It's not divisible by 5, yet still contain 5 in it.

Log in to reply