Find highest common factor 12 & 20

2 answers:

6 0

$D_{12}=\{1,2,3,\boxed{\underline{4}},6,12\} \\ D_{20}=\{1,2,\boxed{\underline{4}},5,10,20\} \\ \\ \text{Answer:4}$

5 0

It's 4. The factors of 12 are: 1,2,3,4,6,12. The factors of 20 are: 1,2,4,5,10,20.

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To know the future value of an specific amount that is borrowed from a bank we use the following equation: $FV= PV\imes{(1+n\times{i})}$ , where FV is future value, PV present value, n the amount of periods and i the interest rate.
In this particular case, the present value of the loan is $400, n=4 (4 years), i=5%. Then the future value equals: $FV= 400\times(1+4\times0.05)$ . Then FV= $480, which is the total amount of money she would have to return in 4 years.
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