iran-konkur 2018 Q151

iran-konkur · Other · konkur-riazi_1397_specialized Number Theory Modular Arithmetic Computation
151- When natural number $A$ is divided by 23, the remainder is 5, and when $A$ is divided by 17, the remainder is 9. What is the largest remainder when the three-digit number $A$ is divided by 12?
(1) zero (2) $2$ (3) $6$ (4) $7$
\textbf{151-} When natural number $A$ is divided by 23, the remainder is 5, and when $A$ is divided by 17, the remainder is 9. What is the largest remainder when the three-digit number $A$ is divided by 12?

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(1) zero \hfill (2) $2$ \hfill (3) $6$ \hfill (4) $7$

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