Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ — decoded step-by-step.
Solve it the standard way once — then learn the shortcut.
Q · LogarithmMedium · 45s
loga₄ + loga₁₆ + loga₆₄ + loga₂₅₆ = 10. Then a = ?
TopicLogarithm
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
The given expression is
loga(4 × 16 × 64 × 256) = 10
loga₄₁₀ = 10
Final Answer: Option A — 4