Question

$(121-45)+5$ equals

• A. 23
• B. 67
• C. 81
• D. 14

Answer 1

The correct option is C

81

We know that,
$(x-y)+z=x-(y-z)$, for all numbers $x$, $y$, $z$ with $y>z$.

Since the above is true for all the numbers, it must be true for
$x=121$, $y=45$ and $z=5$ also, as $y=45>5=z$

So, $(121-45)+5$
$=121-(45-5)$
$=121-40=81$