what least number should be added to 1536, so that the sum is completely divisible by 21?
Choose the most appropriate option:
A) 16 B) 17 C) 18 D) 19 E) 20
<gadget id="calculator">1_536 % 21</gadget>
<output>3</output>

<gadget id="calculator">21 - 3</gadget>
<output>18</output>

<result>C</result>
what least number should be added to 1536, so that the sum is completely divisible by 21?
subtract(21, reminder(1536, 21))
"1536 ÷ 21 = 73 reminder - 3 3 + 18 = 21 hence 18 should be added to 1536 so that the sum will be divisible by 21 answer : c"