Hard
When the first digit and the last digit of a five-digit number, which is a multiple of 72, are erased, we get 679. What is the number?
Explanation
Explanation
The number has the form (first digit),6,7,9,(last digit). Testing the given options for exact divisibility by 72, only 36792 divides evenly (72 x 511 = 36792).
PRO TIP
Re-check your working by substituting the answer back into the original question.