RRB Group D Mock Test 01 – Question 56

Question:

What should come in place of the question mark (?) in the given series?
211, 239, 253, 281, 295, 323, ?

दी गई श्रृंखला में प्रश्न चिह्न (?) के स्थान पर क्या आना चाहिए?
211, 239, 253, 281, 295, 323, ?

Options :

  • a) 339
  • b) 355
  • c) 345
  • d) 337
  • a) 339
  • b) 355
  • c) 345
  • d) 337

correct answer : d)

Explanation :

Alternating differences:
211 + 28 = 239
239 + 14 = 253
253 + 28 = 281
281 + 14 = 295
295 + 28 = 323
323 + 14 = 337.

वैकल्पिक मतभेद:
211 + 28 = 239
239 + 14 = 253
253 + 28 = 281
281 + 14 = 295
295 + 28 = 323
323 + 14 = 337.

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