“ Pattern, pattern, pattern .” Can you see it? By far, this is the most controversial mathematics question appeared in year 2019 PSLE . It is shown below too. Some primary 4 students have encountered such question in the school test. Among the 12 famous schools, “ seeing pattern through figures ” question appeared only 5 times out of total 24 test papers. The schools are: (1) Nanyang Primary School (SA1 test) (2) Tao Nan Primary School (SA1 & SA2 test) appeared twice ! (3) Henry Park Primary School (SA2 test) (4) Catholic High School (SA2 test) The above 4 primary schools have early exposure with such topic to be quizzed. Nanyang Primary School 2018 SA1 Mathematics, question 42. Part (a) is easy. The pattern is obvious. 4, 6, 8, 10. You need to find the pattern carefully for the number of matchsticks, 12, 19, 26, etc. It has the pattern of ( number of triangles x 3 + n ) . Alternatively, you can draw the ...