Exam Success helps students improve their English from Grade 3 - 12 with our online English homework and help students prepare for selective high school entrance tests. Check it out at https://www.examsuccess.com.au. I'm going through Q13 of the Mathematics Sample Test 1 of the Selective Schools Placement Test Samples. You can download the original questions here.
http://www.schools.nsw.edu.au/media/downloads/schoolsweb/learning/k_6assessments/ss/mathstest1.pdf
Many people find this question difficult re: the design and the vedic square but it is quite a simple question involving uncovering links in information. I hope you find this useful.
You can download my books on the website. Good Luck in your exams!!!!