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SSC CGL 2026 PYQ — Question 25

SSC CGL Tier II - 19 Jan 2026 - Shift 1 • Quantitative Aptitude • Q25

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If 3x - ky + 8 = 0 and 9x - 18y + 20 = 0 have no solution, find k.

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Correct answer: C

Explanation

The correct answer is Option 3 i.e. 6.

For no solution, lines are parallel but not coincident: 39=−k−18≠820\frac{3}{9} = \frac{-k}{-18} \neq \frac{8}{20}

39=−k−18\frac{3}{9} = \frac{-k}{-18} ⇒ 13=k18\frac{1}{3} = \frac{k}{18} ⇒ k = 6