Question

Anita divides 1438 by a multiple of 10. Her answer has a 3 in the tenths column. what number did she divide by?

Answer 1

40

Explanation:

Given that Anita divides 1438 by a multiple of 10

i.e. she might have divided by 10 or 20 or 30 .....

The tenth column is 3

So quotient value would be

30+d for some d in the unit column

It may be 31 or 32.....

Say it is 31, then 1438/31 =46.38 and

1438/39 = 36.87

i.e she must have divided by 40 only

Verify:

1438/40 =35 as quotient and 38 as remainder.

So she divided by 40

Answer 2

For this case, the first thing we are going to do is define a variable.
We have then:
x: unknown number and multiplo of 10
We then have the following number:
1438
Dividing between the unknown number we have:

`1438 / x`
As your answer "have a 3 in the tenths column" we have then:

`1438 / x = 14.38`
Clearing x we have:

`x = 1438 / 14.38 x = 100`
Answer:
Anita divided between the following multiple number of 10:
x = 100