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The value of $13⨀ \limits_{15}18$ where $⨀ \limits_{15}$ is multiplication modulo 15 : |
7 3 9 4 |
9 |
The correct answer is Option (3) → 9 $13⨀ \limits_{15}18$ = Remainder $\left(\frac{13×18}{15}\right)$ $=\frac{225}{15}+\frac{9}{15}=15×15+9$ ∴ Remainder = 09 |
