Find The Pattern - 2
Number Theory
Level
1
We are given the equations below.
\[ \begin{array}{ccrc} 987654321&\times&9&=&08\,888\,888\,889\\ 987654321&\times&18&=&17\,777\,777\,778\\ 987654321&\times&27&=&26\,666\,666\,667\\ 987654321&\times&36&=&35\,555\,555\,556\\ 987654321&\times&45&=&44\,444\,444\,445\\ 987654321&\times&54&=&53\,333\,333\,334\\ 987654321&\times&63&=&62\,222\,222\,223 \\ \end{array}\]
What is the value of \[ 987654321 \times 72 ? \]
Note: Can you explain what is happening?
by
Chung Kevin