5 and 6 pls solve this

We have to add both number
13+5=18
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Answer for no.5
Hope it helps..

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Solution for no.6
Let the ten's digit be x and unit's digit be y.

Then, (10x + y) - (10y + x) = 36

=>9(x - y) = 36

=>x - y = 4.{Ans}

Regards Soham..
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