Remark: The difference of a two digit number and its reversed number is exactly divisible by 9 and the quotient obtained is either the difference of the digits of the original 2-digit number or 0. yzx = 100z + 10x + y. Step-4 : Divide the answer by 111. = 111 (x + y + z) ÷ 111 = (x + y + z).
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A 2 digit number can always be written as a combination of 2 different numbers.for eg:– 65 = 10 × 6 + 5 → 6 is at tens place and 5 is at ones place. 23 = 10 × 2 + 3 → 2 is at tens place and 3 is at ones place Thus, any two digit number can be written in a general form as 10 × x + y Similarly, 572 = 5 × 100 + 7 × 10 + 2 123 = 1 × 100 + 2 × 10 + 3 The three digit number xyz can be written as 100 × x + 10 × y + z
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