Question 35

State whether the statement is true (T) or false (F).

In a 2-digit number, the unit's place digit is x. If the sum of the digits be 9, then the number is (10x-9).

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Solution

False
Given, unit's digits=x
and sum of digits=9
$∴$ Ten's digit =9-x
Hence, the number=10(9-x)+x=90-10x+x=90-9x

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Standard VIII Mathematics

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Question 35 State whether the statement is true (T) or false (F). In a 2-digit number, the unit's place digit is x. If the sum of the digits be 9, then the number is (10x-9).

False Given, unit's digits=x and sum of digits=9 ∴ Ten's digit =9-x Hence, the number=10(9-x)+x=90-10x+x=90-9x

Question 35

State whether the statement is true (T) or false (F).

In a 2-digit number, the unit's place digit is x. If the sum of the digits be 9, then the number is (10x-9).

False
Given, unit's digits=x
and sum of digits=9
$∴$ Ten's digit =9-x
Hence, the number=10(9-x)+x=90-10x+x=90-9x