If the number 653ab is divisible by 90, then (a + b) = ?  Choose the correct choice.
A) 2	B) 3	C) 4	D) 6	E) 8
90 = 10 x 9   Clearly, 653ab is divisible by 10, so b = 0   Now, 653a0 is divisible by 9.   So, (6 + 5 + 3 + a + 0) = (14 + a) is divisible by 9. So, a = 4.   Hence, (a + b) = (4 + 0)= 
<gadget id="calculator">(4 + 0)</gadget>
<output>4</output>
4.   ANSWER:4
<result>C</result>
If the number 653ab is divisible by 90, then (a + b) = ?