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Answers
Answer:
Let the digits in tens place be x and the digits in units place be y.
Therefore, the original two digit number is 10x + y.
Given that Sum of digits of a two digit number is 8.
= > x + y = 8 ------- (1)
Given that The new number increases by 18, when the digits are reversed.
= > 10y + x = 10x + y + 18
= > 10y - y = 10x - x + 18
= > 9y = 9x + 18
= > 9y - 9x = 18
= > y - x = 2
= > x - y = -2 ----- (2)
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On solving (1) & (2), we get
= > x + y = 8
= > x - y = -2
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2x = 6
x = 3.
Substitute x = 3 in (1), we get
= > x + y = 8
= > 3 + y = 8
= > y = 8 - 3
= > y = 5.
So,
= > 10x + y
= > 10(3) + 5
= > 35.
Therefore, the original number = 35.
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