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UGC-NET-Paper1

Maths

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The number X in the following series :
3, 8, 18, 38, X, ... is

1. 78
2. 80
3. 76
4. 74

निम्नलिखित श्रृंखला में संख्या X:
3, 8, 18, 38, X, ... है

1. 78
2. 80
3. 76
4. 74
This Question came in
UGC-NET-02-December-2019-Shift-1-Q17
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Detailed Explanation & Answer
8 - 3 = 5
18 - 8 = 10
38 - 18 = 20

Following this pattern, the next difference should be double 20, which is 40.

To find X, we add 40 to the last term in the series:

38 + 40 = 78
8 - 3 = 5
18 - 8 = 10
38 - 18 = 20

इस पैटर्न के बाद, अगला अंतर दोगुना 20 होना चाहिए, जो कि 40 है।

X ज्ञात करने के लिए, हम श्रृंखला के अंतिम पद में 40 जोड़ते हैं:

38 + 40 = 78
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