Question

In a two digit number, the units digit is n and tens digit is(n−1). What is the number? a) kn−1 b) 2n+3 c) 3+n d ) 11n−10​

Answer 1

Answer:

11n-10

Step-by-step explanation:

for two digits no we can write

10*(tens place digit)+unit place digit

10*(n-1)+n

=11n-10

Answer 2

Answer:

Suppose our number is 53.

0It has 3 at units digit and 5 as tens digit

So 53 can be written as 10×5+3

Similarlly any 2 digit number say 'yx' with x at units digit and y as tens digit which can be written as 10x+y

Another approach is say our number is yx then by dividing it with 10 we get remainder x and quotient as y

So we know that dividend=divisor×quotient+remainder

So xy=10×y+x

Step-by-step explanation:

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