The smallest number to be added to 1000, so that 45 divides the sum exactly, is :

The smallest number to be added to 1000, so that 45 divides the sum exactly, is :
[A]10
[B]20
[C]35
[D]80

35
$latex 1000 = \left ( 45\times 22 \right )+10$
$latex \therefore 45-10 = 35\ to \ be \ added.$
So, the smallest number to be added to 1000 to make the sum exactly divisible by 45 is 35, Hence option [C] is correct answer.


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