Problem: the ratio of 2 numbers is 3 : 7 and their h . c . f . is 12 . their l . c . m . is ?
Rationale: "let the numbers be 3 x and 7 x their h . c . f . = 3 so the numbers are 3 * 12 , 7 * 12 = 36,84 l . c . m . = 252 answer is c"
annotated_formula: sqrt(divide(12, add(power(7, 3), add(power(2, 3), power(3, 3)))))