Question

The sum of the digits of a two digit number is 16.If 18 is added to the number, the digit of the numbers interchange.The number is

(a) 75
(b) 57
(c) 97
(d) 79​

Answer 1

Answer:

Let the original number be (10x + y)

Now, A/Q

⇒ 10x + y + 18 = 10y + x

⇒ 9y – 9x = 18

⇒y – x = 2 (1)

And x + y = 16 (2)

Adding equation(1) and (2)

⇒ 2y = 18

⇒ y = 9

From equation (1)

⇒ x = 7

∴ The original number is 79.

Hence,the correct answer is option (c)79.

Step-by-step explanation:

Hope it helps✌️

Answer 2

Answer:

the answer is option c

look at the pic for explanation