Find the number, the second digit of which is smaller than its first digit by 4, and if the number was divided by the digit’s sum, the quotient would be 7.
Choose the correct choice.
A) 64  B) 74  C) 84  D) 87  E) 89
84 is the desired number.   84/12= 
<gadget id="calculator">84/12</gadget>
<output>7</output>
7   ANSWER:84
<result>C</result>
Find the number, the second digit of which is smaller than its first digit by 4, and if the number was divided by the digit’s sum, the quotient would be 7.