SSC CHSL Tier-1 practice question
In the series 7, 49, ?, 10192, each number is obtained by multiplying the previous number by the sum of its digits. What number will replace the question mark?
From a SSC CHSL Tier-1 Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (D) 637
The rule is: each number is obtained by multiplying the previous number by the sum of its digits. Starting from 49, the digit sum is 13, so the next term is 49 × 13 = 637. Full series: 7, 49, 637, 10192.
हिंदी में प्रश्न
श्रृंखला 7, 49, ?, 10192 में, प्रत्येक संख्या पिछली संख्या को उसके अंकों के योग से गुणा करके प्राप्त की जाती है है। प्रश्न-चिह्न के स्थान पर कौन-सी संख्या आएगी?
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सही उत्तर: (D) 637
नियम है: प्रत्येक संख्या पिछली संख्या को उसके अंकों के योग से गुणा करके प्राप्त की जाती है। 49 से शुरू करते हुए, अंकों का योग 13 है, इसलिए अगला पद 49 × 13 = 637 होगा। पूरी श्रृंखला: 7, 49, 637, 10192।
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