Question:
Find the next number in the series:
5, 7.5, 11.5, 17, ?
श्रृंखला में अगली संख्या ज्ञात कीजिए:
5, 7.5, 11.5, 17, ?
Options:
- 21
- 22.5
- 23.5
- 24
- 21
- 22.5
- 23.5
- 24
Correct Answer: d)
Explanation:
Differences between consecutive terms:
\(7.5 – 5 = 2.5\)
\(11.5 – 7.5 = 4.0\) (+1.5)
\(17 – 11.5 = 5.5\) (+1.5)
Next difference = \(5.5 + 1.5 = 7.0\).
Next number = \(17 + 7.0 = 24\).
पदों का अंतर:
\(7.5 – 5 = 2.5\)
\(11.5 – 7.5 = 4.0\)
\(17 – 11.5 = 5.5\)
अंतर में प्रत्येक बार 1.5 जुड़ रहा है, अतः अगला अंतर = \(5.5 + 1.5 = 7.0\)।
अगली संख्या = \(17 + 7.0 = 24\)।