Find the missing term in the following number series : 2, 9, 28, ?, 126, 217,…

2024

Find the missing term in the following number series : 2, 9, 28, ?, 126, 217, 344

  1. A.

    37

  2. B.

    65

  3. C.

    91

  4. D.

    115

Attempted by 52 students.

Show answer & explanation

Correct answer: B

The given series is: 2, 9, 28, ?, 126, 217, 344.

Step 1: Observe the pattern in the series.

Check if the terms follow the formula n³ + 1.

For n = 1: 1³ + 1 = 2

For n = 2: 2³ + 1 = 8 + 1 = 9

For n = 3: 3³ + 1 = 27 + 1 = 28

For n = 4: 4³ + 1 = 64 + 1 = 65

For n = 5: 5³ + 1 = 125 + 1 = 126

For n = 6: 6³ + 1 = 216 + 1 = 217

For n = 7: 7³ + 1 = 343 + 1 = 344

Thus, the missing term is 65.

हिन्दी उत्तर:

दी गई श्रेणी है: 2, 9, 28, ?, 126, 217, 344।

चरण 1: श्रेणी में पैटर्न का अवलोकन करें।

सत्यापित करें कि पद n³ + 1 के नियम का पालन करते हैं।

n = 1 के लिए: 1³ + 1 = 2

n = 2 के लिए: 2³ + 1 = 8 + 1 = 9

n = 3 के लिए: 3³ + 1 = 27 + 1 = 28

n = 4 के लिए: 4³ + 1 = 64 + 1 = 65

n = 5 के लिए: 5³ + 1 = 125 + 1 = 126

n = 6 के लिए: 6³ + 1 = 216 + 1 = 217

n = 7 के लिए: 7³ + 1 = 343 + 1 = 344

इसलिए, लुप्त पद 65 है।

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