Which is divisible by 8

[Guest]

Which is divisible by8.
1336
1473
1534
1662

 

[stapel]

Divide each by 8. See which one doesn't have a remainder.

Eliz.

 

[soroban]

Hello, tomorrow!

Which is divisible by 8? $\displaystyle \;1336,\;1473,\;1534,\;1662$

They are all divisible by 8: $\displaystyle \;\begin{array}{cccc}1336\,\div\,8\:=\:167 \\ 1473\,\div\,8\:=\:184\frac{1}{8} \\ 1534\,\div\,8\:=\:191\frac{3}{4} \\ 1662\,\div\,8\:=\;207\frac{3}{4}\end{array}\;\;\;$ . . . but seriously . . .


There is a test of divisibility-by-8.

It goes like this: a number is exactly divisible by 8
$\displaystyle \;\;$if the rightmost three-digit number is divisible by 8.

This is convenient when testing, for example: $\displaystyle 3,805,274,312$

Since $\displaystyle 312\,\div\,8\:=\:39$, the entire number is divisible by 8.


But it not worth the trouble with only a four-digit number.
$\displaystyle \;\;$You might as well grab a pencil or a calculator.