the ratio of 2 numbers is 5 : 2 and their h . c . f . is 20 . their l . c . m . is ?
"let the numbers be 5 x and 2 x their h . c . f . = 20 so the numbers are 5 * 20 , 2 * 20 = 100 , 40 l . c . m . = 200 answer is c"
sqrt(divide(20, add(power(2, 5), add(power(2, 5), power(5, 5)))))