A, B, C and D are four consecutive odd numbers and their average is 42 . product of B and D ?

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$A, B, C$ and $D$ are four consecutive odd numbers and their average is $42 .$ What is the product of $B$ and $D$ ?

A

$1860$

B

$1890$

C

$1845$

D

$1677$

Solution

since the numbers are consecutive, they should be equidistant from the average, i.e., $42.$

Hence the numbers are $39,41,43,$ and $45 .$

Product of $B$ and $D =41 \times 45=1845$

Standard 13

Quantitative Aptitude

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