The table shows the number of shares of each of the 5 stocks owned by Mr. Sami. If Mr Sami was to sell 20 shares of Stock X and buy 24 shares of stock y, what would be the increase in range of the number of shares of the 5 stocks owned by Mr Sami?
it's not a bug, the answers were given as *81, *27, ... , instead of 81, 27, ..., so when the result of *9 x *6 is 81, and 81 is an odd, it has to be set back using *m = 3m, *27 = 81, so the answer is *27.