Question

Question 3

Match the items in column 1 with the items in column 2:
$\begin{array}{cccc}& \text{Column 1}& & \text{Column 2}\\ \left(i\right)& 35& \left(a\right)& \text{Multiple of 8}\\ \left(ii\right)& 15& \left(b\right)& \text{Multiple of 7}\\ \left(iii\right)& 16& \left(c\right)& \text{Multiple of 70}\\ \left(iv\right)& 20& \left(d\right)& \text{Factor of 30}\\ \left(v\right)& 25& \left(e\right)& \text{Factor of 50}\\ & & \left(f\right)& \text{Factor of 20}\end{array}$

Answer 1

Multiples of 8 are the numbers which are exactly divisible by 8, such as 8, 16, 24, 32, 40, ...
Multiples of 7 are the numbers which are exactly divisible by 7, such as 7, 14, 21, 28, 35, 42, 49, ...
Multiples of 70 are the numbers which are exactly divisible by 70, such as 70, 140, 210, 280, 350, ...
Factors of 30 are the numbers which can divide 30 exactly. Factors of 30 are 1, 2, 3, 5, 6, 10, 15, 30.
Factors of 50 are the numbers which can divide 50 exactly. Factors of 50 are 1, 2, 5, 10, 25, 50.
Factors of 20 are the numbers which can divide 20 exactly. Factors of 20 are 1, 2, 4, 5, 10, 20.

So,
Factors of 35 are 1, 5, 7, 35
Multiples of 15 are 15, 30, 45, 60
Factors of 16 are 1, 2, 4, 8, 16
Multiples of 20 are 20, 40, 60, 80
Multiples of 25 are 25, 50, 75, 100


Hence on the basis of above conclusions we can match the columns as below:
$\left(i\right)\to \left(b\right)$
$\left(ii\right)\to \left(d\right)$
$\left(iii\right)\to \left(a\right)$
$\left(iv\right)\to \left(f\right)$
$\left(v\right)\to \left(e\right)$