What is the two-digit number? I. Sum of the digits is 7. II. Difference between the number and the number obtained by interchanging the digits is 9. III. Digit in the ten's place is bigger than the digit in the unit's place by ?->(Show Answer!)

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What is the two-digit number? I. Sum of the digits is 7. II. Difference between the number and the number obtained by interchanging the digits is 9. III. Digit in the ten's place is bigger than the digit in the unit's place by ?->(Show Answer!)

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1. What is the two-digit number? I. Sum of the digits is 7. II. Difference between the number and the number obtained by interchanging the digits is 9. III. Digit in the ten's place is bigger than the digit in the unit's place by 1.

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By: guest on 01 Jun 2017 05.48 pm

Let the tens and units digit be x and y respectively. I. x + y = 7. II. (10x + y) - (10y + x) = 9 x - y = 1. III. x - y = 1. Thus, I and II as well as I and III give the answer. Correct answer is (E).

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