vegetables [odd one out] [pairs of pictures] [appearing]

Which number is remaining? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Here is a grid containing 25 pictures. 24 of those are pairs of pictures showing the same vegetable. Click on two pictures which you think are a pair. They will disappear revealing numbers below. Click on all 12 sets of picture pairs. One picture will remain, by clicking on it you will reveal the last number. Enter this number into the quiz on the right hand side to see if you are correct.