Cube root

For 13, Sam wrote 2891 instead of the correct cube number. By how much was he wrong?

Correct answer:

x =  694

Step-by-step explanation:

$$\begin{gathered} V_1=13^3=2197 \\ {V}_2=2891 \\ x=\mathrm{\mid }{V}_1-V_2\mathrm{\mid }=\mathrm{\mid }2197-2891\mathrm{\mid }=694 \end{gathered}$$

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