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Q.

Take three consecutive odd numbers and find their product if the sum of numbers is 21.


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a

314

b

312

c

256

d

315 

answer is D.

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Detailed Solution

We know that
The number which are not divided by 2 called odd number
Example: 1, 3, 5…………
The odd number that are one after another called consecutive odd number
Example: (1,3,5)(5,7,9)(11,13,15)……….
Assume that we take 3 consecutive odd number,
(5,7,9)
As,
5+7+9=21
Now we multiply the three consecutive odd number
=5×7×9
=315
Hence the product of three consecutive odd numbers = 315
Correct option is 4.
 
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