what least value should be replaced by * in 223 * 431 so the number become divisible by 9
"explanation : trick : number is divisible by 9 , if sum of all digits is divisible by 9 , so ( 2 + 2 + 3 + * + 4 + 3 + 1 ) = 15 + * should be divisible by 9 , 15 + 3 will be divisible by 9 , so that least number is 3 . answer : option a"
subtract(431, subtract(431, 431))