SSC_CPO_PYQ_27_June_2024_S1_Q18

Question:

Which of the following numbers will replace the question marks (?) in the given series? 1, 6, 15, 28, ?, ?, 91

निम्नलिखित में से कौन सी संख्याएँ दी गई श्रृंखला में प्रश्नवाचक चिह्नों (?) का स्थान लेंगी? 1, 6, 15, 28, ?, ?, 91

Options:

  • a) 40, 60
  • b) 42, 54
  • c) 45, 66
  • d) 44, 54
  • a) 40, 60
  • b) 42, 54
  • c) 45, 66
  • d) 44, 54

correct answer : c)

Explanation:

The differences between consecutive terms are increasing by 4: +5, +9, +13, +17, +21, +25. 28 + 17 = 45. 45 + 21 = 66. 66 + 25 = 91.

लगातार पदों के बीच का अंतर 4 से बढ़ रहा है: +5, +9, +13, +17, +21, +25। 28 + 17 = 45. 45 + 21 = 66. 66 + 25 = 91।

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