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Question

What is the largest number that divides 626, 3127 and 15628 and leaves remainders of 1,2 and 3 respectively.

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Solution

Subtracting the remainders from given numbers

we have,
6261=625
31272=3125
156281=15625

Now the factors of the above numbers are,

625=5×5×5×5
3125=5×5×5×5×5
156125=5×5×5×5×5×5

The HCF of following numbers 625

Hence 625 is the largest number that divides
626626, 31273127 and 1562815628 and leaves remainders of 1,21,2 and 33 respectively.

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