Question

Which of the following option(s) is/are correct for $a$ and $b$ on the number line given below?

• A. $a=6,b=-3$
• B. $a=-3,b=6$
• C. $a+b=3$
• D. $a\times b=-18$

Answer 1

Answer: (B), (C), (D)

$a\times b=-18$

Each interval represents $1,$ so find the missing number by adding or subtracting $1.$

We can get missing number $a$ by adding $1$ to $-4$ or subtracting $1$ from $-2.$
$\Rightarrow a=-4+1=-3$

Similarly,
$\Rightarrow b=5+1=6$

$\therefore a+b=-3+6=3$ and $a\times b=-3\times 6=-18$