Solve for $\overline{xyz}: \overline{xyz}\times \overline{zyx}=\overline{xzyyx}$

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In summary, the equation is asking for the value of the three-digit number $\overline{xyz}$ that, when multiplied by its reverse $\overline{zyx}$, equals the five-digit number $\overline{xzyyx}$. To solve for $\overline{xyz}$, you can use algebraic methods such as simplifying the equation and solving for the unknown variable. The letters x, y, and z represent individual digits in a three-digit number. There can be more than one solution to this equation, as there are infinitely many three-digit numbers that can be multiplied by their reverse to equal a five-digit number. This equation is a fun mathematical puzzle that challenges your algebraic skills and critical thinking, and it highlights the
  • #1
Albert1
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$\overline{xyz}$ is a three digits number
$\overline{zyx}$ is also a three digits number
if :$\overline{xyz}\times \overline{zyx}
=\overline{xzyyx}$
please find:$\overline{xyz}$
 
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  • #2
Albert said:
$\overline{xyz}$ is a three digits number
$\overline{zyx}$ is also a three digits number
if :$\overline{xyz}\times \overline{zyx}
=\overline{xzyyx}$
please find:$\overline{xyz}$
$(100x+10y+z)(100z+10y+x)
=10000x+1000z+100y+10y+x-(1)$
for $10000xz<100000$
we have $xz<10$
compare both sides of(1):$xz=x\,\ ,or\,\, z=1$
(1) becomes :
$10000x+1000y(x+1)+100(x^2+y^2+1)+10y(x+1)+x=10000x+1000+100y+10y+x$
or $100y(x+1)+10(x^2+y^2+1)+y(x+1)=100+10y+y-(2)$
compare both sides of (2):
$\therefore y(x+1)<10,\,, and ,\, y(x+1)=y$
$for (x+1)>1 \,\,\therefore y=0 ,and \,\,x=3$
we get :$\overline {xyz}=301$
 
Last edited:

1. What is the equation asking for?

The equation is asking for the value of the three-digit number $\overline{xyz}$ that, when multiplied by its reverse $\overline{zyx}$, equals the five-digit number $\overline{xzyyx}$.

2. How do I solve for $\overline{xyz}$?

To solve for $\overline{xyz}$, you can use algebraic methods such as simplifying the equation and solving for the unknown variable. It may also be helpful to break down the problem into smaller, more manageable steps.

3. What do the letters x, y, and z represent in the equation?

The letters x, y, and z represent individual digits in a three-digit number. For example, if $\overline{xyz}$ is 123, then x=1, y=2, and z=3.

4. Can there be more than one solution to this equation?

Yes, there can be more than one solution to this equation. In fact, there are infinitely many solutions since there are infinitely many three-digit numbers that can be multiplied by their reverse to equal a five-digit number.

5. What is the significance of this equation?

This equation is a fun mathematical puzzle that challenges your algebraic skills and critical thinking. It also highlights the interesting properties of numbers and their relationships.

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