1.

If the sum of te digits of a two digit no. is 9 and. their difference is 1 find the no.​

Answer»

Answer:

The SUM of the DIGITS of the two-digit number you started with is 9 which is DIVISIBLE by 9. HENCE the two-digit number is divisible by 9. What are the two-digit NUMBERS which are divisible by 9? Add 63 to each of these.

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