100 : 10 :: 64 : ? A8 B9 C7 D10 Show answer & explanationCorrect answer: AExplanation100:10::64:8100 : 10 :: 64 : 8100:10::64:8 100=102⇒100=10100 = 10^2 \Rightarrow \sqrt{100} = 10100=102⇒100=10 64=8\sqrt{64} = 864=8