Question

Select the odd one out.

• A. $(-1)\times (-1)$
• B. $(-1)\times (-1)\times (-1)$
• C. $(-1)\times (-1)\times (-1)\times (-1)$
• D. $(-1)\times (-1)\times (-1)\times (-1)\times (-1)\times (-1)$

Answer 1

The correct option is B

$(-1)\times (-1)\times (-1)$

(a) $(-1)\times (-1)=1$
[(-x)(-y) = (xy)]

(b) $(-1)\times (-1)\times (-1)=-1$
[(-x)(y) = (-xy)]

(c) $(-1)\times (-1)\times (-1)\times (-1)=1$ [(-x)(-y)= (xy)]

(d) $(-1)\times (-1)\times (-1)\times (-1)\times (-1)\times (-1)=1$ [(-x)(-y) = (xy)]

Here value of options (a), (c), (d), are same since even number of negative numbers are multiplied but in option (b), odd number of negative numbers are multiplied.