Question

The product of two numbers is 3.92. If one of them is 1.40, then find the other number.
[3 Marks]

Answer 1

Let the other number be $x$.

1.40 $\times$ $x$ = 3.92 [1 Mark]

$\Rightarrow$ $x$ = 3.92 $÷$ 1.4

$\Rightarrow$ $x$ = 39.2 $÷$ 14 [1 Mark]
(On multiplying both numerator and denominator by 10)
$\Rightarrow$ $x$ = 392 $÷$ 140
$\Rightarrow$ $x$ = 2.8

$\therefore$ The other number is 2.8. [1 Mark]