Question

A two digit number x is the digit at units place and y is the digit at tens place, then the number is.

• A. $10y+x$
• B. $10x+y$
• C. $10y-x$
• D. $10-y$

Answer 1

Answer: (A)

$10y+x$

As it is two digit number and $x$ is the digit at the unit's place and $y$ is the digit at the tens place .

Let us take an example suppose number is $23$

so here $3$ is the digit at the unit place and $2$ is the digit at the tens place

We can write it as $23=20+3=2\left(10\right)+3$

Hence similarly we can write that number as

$10y+x$