class 6 IMO Mock test contest. Negative signs do not appear in your questions and answers. Your answer of question 46 (un-shaded area) is wrong. The child wasted lot of time in figuring out the wrong question. Question 16 has negative answer. There too the sign does not appear. You should correct your paper and see it on the screen before you send it out. It is unfair to kids when questions are wrong in a contest