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TIMO 2018 Grade 6 Heat Set 4 Question 1

TIMO · TIMO 2018 Grade 6 Heat Set 4

Question 1

Given A and C are two non-zero digits, we have:
1. CA is divisible by 19;
2. AC can be expressed by a product of 2 prime numbers;
Find the 2-digit number CA .

Question illustration