Question

1.
2.
3.
4.
Answer (Detailed Solution Below)

Option 2 : 75 / 75

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Detailed Solution

सही उत्तर 75 / 75 है।

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Question:

Find the missing term of the series 3, 8, 15, 26, 39, 56, ? / श्रृंखला 3, 8, 15, 26, 39, 56, ? का लुप्त पद ज्ञात कीजिए।

1.
73 / 73
2.
75 / 75
3.
74 / 74
4.
77 / 77

Correct Answer: 75 / 75

The successive differences are 5, 7, 11, 13, 17 — consecutive prime numbers — so the next difference is 19, giving 56 + 19 = 75. / क्रमिक अंतर 5, 7, 11, 13, 17 हैं — क्रमिक अभाज्य संख्याएँ — अतः अगला अंतर 19 होगा, जिससे 56 + 19 = 75 प्राप्त होता है।

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