4. Find the greatest number that will divide 623,729, and 841 leaving remainders 5 in each case.
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Answer: 20
Step-by-step explanation: Numbers are 623,729 and 841 and remainders are 3,9,1 respectively
∴ Numbers will be 623−3=620
729−9=720
841−1=840
Now let us find the H.C.F of 620,720 and 840
The H.C.F of 620,720 and 840 is 20
∴ The required largest number =20
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