arithmetic - a boy multiplied 861 by a certain number and obtained 465523 as his answer if in the answer both 5 are wrong and the other digits are correct then the correct answer would be - skillgun

861 = 3 x 7 x 41
So, the required number must be divisible by each one of 3, 7, 41
453680 (Sum of digits = 26, not divisible by 3)
453181 (Sum of digits = 22, not divisible by 3)
456881 (Sum of digits = 32, not divisible by 3)
467523 is divisible by 3, 7, 47.