Rahul Sofat Solutions for Chapter: Whole Numbers, Exercise 10: Quiz

If $X+Y=Z$, where $X,Y$ and $Z$ each stand for a distinct digit from $1$ to $9$, what is the greatest digit that $X$could be?

If $X+Y=Z$, where $X,Y$and $Z$ each stand for a distinct digit from $1$ to $9$. What is the greatest digit that $Z$ could be?

If $X+Y=Z$, where $X,Y$and $Z$ each stand for a distinct digit from $1$ to $9$. What is the smallest digit that $Z$ could be?

If $X+Y=Z$, where $X,Y$and $Z$ each stand for a distinct digit from $1$ to $9$:

If $X,Y$ and $Z$ are odd, what digit(s) could $Z$be? Why?

If $X+Y=Z$, where $X,Y$and $Z$ each stand for a distinct digit from $1$ to $9$:

If $Z$ is $3$more than $X$ , what digit(s) could $Y$ be?

If $\mathrm{X}+\mathrm{Y}=\mathrm{Z}$, where $\mathrm{X}, \mathrm{Y}, \mathrm{Z}$ each stand for a distinct digit from $1$ to $9$. If $\mathrm{X}=5\mathrm{Y}$, then what digit could $\mathrm{Z}$ be? Why?