What should come in place of question mark (?) in the following number series?
655 439 314 250 223 (?)
Correct Answer: Option E
The difference between two consecutive numbers in given series can be evaluated as:
→ 655 – 439 = 216 = 63
→ 439 – 314 = 125 = 53
→ 314 – 250 = 64 = 43
→ 250 – 223 = 27 = 33
Thus it can be clearly seen that the difference between consecutive numbers makes a pattern as above.
Hence the difference between next consecutive numbers
= 23
= 8
Let next number in given series be X. Then,
⇒ 223 – X = 8
⇒ X = 223 – 8
⇒ X = 215.
Hence the required term in given series is 215.
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