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Fnd the sum of all the numbers between 0 and 20000 which is divisible by 9999.

 Dec 4, 2019
 #1
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336 6679008978,  7833 3456782289,  897 7790114478,  Total =  6166680 3779205000

 

336 6679008978 mod 9999 =0, 7833 3456782289 mod 9999 =0, 897 7790114478 mod 9999 =0

 Dec 4, 2019
 #2
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Forget the above answer. It is wrong anyway. The following are correct:

 

listforeach(n, d=(2469753 , 3719628 , 12248775 , 12748725 , 26437356 , 30236976 , 49985001 , 49995000 , 74682531 , 80981901 , 111728826 , 113228676 , 149135085 , 157984200 , 199950003 , 199970001), c=n mod 9999)

 Dec 4, 2019

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