Question

The hcf of two numbers is the square root of 441.If one of the numbers is 840 then the other number which is the consecutive multiple of √441

Answer 1

it should be 840-21=819 or 840+21=861 but correct answer should be 819 for u, u can take l.c.m. of 819,840 for yourself and value of underroot 441 is 21