The sum of three consecutive odd integers is 40 more than the first of the numbers.What is the middle number ?

A 19

B 21

C 23

D None

Correct Answer: Option A

ধরি, সংখ্যাগুলো যথাক্রমে x, (x + 2) এবং (x + 4)
⇒ 3x + 6 = x + 40
⇒ 2x = 34
∴ x = 17
অতএব, মাঝের সংখ্যাটি = 17 + 2 = 19