FIND THE LARGEST POSITIVE INTEGER SUCH THAT NONE OF ITS DIGITS IS...

12. Find the largest positive integer such that none of its digits is 0, the sum of its digits is 16 but the sum of the digits of the number twice as large is less than 20. 2015 International Teenagers Mathematics Olympiad Page 3Section B. Answer the following 3 questions. Show your detailed solution on the space provided after each question. Each question is worth 20 points.