the ratio of 2 numbers is 2 : 7 and their h . c . f . is 18 . their l . c . m . is ?
"let the numbers be 2 x and 7 x their h . c . f . = 18 so the numbers are 2 * 18 , 7 * 18 = 36,126 l . c . m . = 252 answer is a"
sqrt(divide(18, add(power(7, 2), add(power(2, 2), power(2, 2)))))