Reversal formed by Repdigits of Base minus 1 by Addition and Multiplication/Examples

Examples of Reversal formed by Repdigits of Base minus 1 by Addition and Multiplication

Reversal of $9 + 9$

\(\ds 9 + 9\)

\(=\)

\(\ds 18\)

\(\ds 9 \times 9\)

\(=\)

\(\ds 81\)

Reversal of $99 + 99$

\(\ds 99 + 99\)

\(=\)

\(\ds 198\)

\(\ds 9 \times 99\)

\(=\)

\(\ds 891\)

Reversal of $7 + 7$ Base $8$

\(\ds 7 + 7\)

\(=\)

\(\ds 16_8\)

\(\ds 7 \times 7\)

\(=\)

\(\ds 61_8\)