1."Hi, Dad," said Doug. "Isn't 1524 your new office number?" "Yes, the four figure part," replied Andy. "Why?" "If you square what you get when you total its two halves, you get three less than your number," said Doug. "15 plus 24 is 39, and the square of that is 1521." Andy was checking the figures. "That's funny. D'you think there are any other 4-figure numbers like that for three less?" You say!

One other number for Andy could be 3724

One other number for Andy could be 4267

One other number for Andy could be 7146