SSC CHSL Premium Mock 07 – Q040

Question:

What should come in place of the question mark (?) in the given series?
40   ?   18   10   4   0

दी गई श्रृंखला में प्रश्नवाचक चिह्न (?) के स्थान पर क्या आना चाहिए?
40   ?   18   10   4   0

Options:

  • 22
  • 25
  • 30
  • 28
  • 22
  • 25
  • 30
  • 28

Correct Answer: d)

Explanation:

Looking at the differences from right to left:

\(4 – 0 = 4\)

\(10 – 4 = 6\)

\(18 – 10 = 8\)

The differences decrease by 2 each step: 12, 10, 8, 6, 4.

Therefore, the difference before 18 should be 10: \(18 + 10 = 28\).

Checking: \(40 – 28 = 12\).

Hence, option (d) is correct.

दाएँ से बाएँ अंतर देखने पर:

\(4 – 0 = 4\)

\(10 – 4 = 6\)

\(18 – 10 = 8\)

क्रमागत अंतर 2-2 बढ़ता जाता है: 4, 6, 8, 10, 12।

अतः 18 से पहले का पद: \(18 + 10 = 28\) होगा।

जाँच: \(40 – 28 = 12\)।

अतः विकल्प (d) सही उत्तर है।

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