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Question

Find the largest positive integer that will divide 100, 245 and 343 leaving remainders 4, 5 and 7 respectively.

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Solution

Given 100,245 and 343 integers and leaving reminders 4,5 and 7 respectively
Then number after deducting reminder are
1004=96
2455=240
and 3437=336
So largest positive integer is H.C.F of 9 6,240.336
Factors of 96=4×4×4
Factorsof 240=4×4×3×5
Factors of 336=4×4×3×7
Then H.C F is 4×4×3=48
Answer is 48


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