find the greatest number which divides 285 and 1249 divisible by 9 and 7
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The required number is HCF of 276 and 1242. [HCF of two or more numbers = product of the smallest power of each common prime factor involved in the numbers.] Hence, the required greatest number which divides 285 and 1249 leaving remainders 9 and 7 respectively is 138
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