RRB NTPC CBT-1 previous year question
Find the positive integral value of x if the fourth proportional of x, x + 1, 2x + 3 is y and y = 3x + 3.
Asked in RRB NTPC 2026 — 18 June Shift 3 · Quantitative Aptitude
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Correct answer: (B) 3
The fourth proportional condition gives y = (x+1)(2x+3)/x, and this equals 3x+3 = 3(x+1). Dividing both sides by (x+1), (2x+3)/x = 3, so 2x+3=3x, giving x = 3.
हिंदी में प्रश्न
यदि x, x 1, 2 3 का चतुर्थनुपाती 3 है और = 3 +3 है, तो » का धनात्मक पूर्णाक मान ज्ञात Pig
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सही उत्तर: (B) 2 ह UC] , 4
चतुर्थानुपाती शर्त से y = (x+1)(2x+3)/x मिलता है, और यह 3x+3 = 3(x+1) के बराबर है। दोनों पक्षों को (x+1) से भाग देने पर, (2x+3)/x = 3, अतः 2x+3=3x, जिससे x = 3 प्राप्त होता है।
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