Question

If 9 x - 9 x-1 = 72, then the value of (2x-1)/(2x+3) is:

Asked in RRB NTPC (UG) CBT-I · 2026
Surds and Indices · Quantitative Aptitude
Exam PYQ4 Options
Quantitative AptitudeSimplificationSurds and IndicesRRB NTPC (UG) CBT-I2026
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A surd is an irrational root that cannot be simplified into a rational number.

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Option B — 3/7

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This lesson explains why rationalising the denominator is useful in exam-style calculations.

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Questions Asked from Surds In Simplification: Rationalise & Simplify in Previous Exams

See how often Surds In Simplification: Rationalise & Simplify has appeared in previous-year questions across major government exams.

High Exam Frequency
12UPSC Questions Asked in These Years:2011, 2012, 2013, 2014, 2015, 2018, 2019, 2020, 2021, 2022, 2023, 2026
10SSC Questions Asked in These Years:2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
7Railways Questions Asked in These Years:2016, 2018, 2021, 2022, 2024, 2025, 2026
16State PSC Questions Asked in These Years:2002, 2004, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
Surds In Simplification: Rationalise & Simplify has appeared in 45 previous-year exam questions, most frequently in State PSC, UPSC and SSC.
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