What least number must be added to 9599, so that the sum is completely divisible by 100 ?  Choose one:
A) 1 B) 2 C) 4 D) 6 E) 8
If we divide 9599 by 100 remainder is 99   100-99= 
<gadget id="calculator">100-99</gadget>
<output>1</output>
1   1nswer : 1
<result>A</result>
What least number must be added to 9599, so that the sum is completely divisible by 100 ?