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AMO 2027 Grades 4-5 SET 10 - Self-study Question 14

AMO · AMO 2027 Grades 4-5 SET 10 - Self-study

Question 14

Find the missing number in each of (a), (b) and (c).

Readable figure data: (a) each square lists top, left, right, bottom; centre. First: 12,18,3,12;45. Middle: 19,?,13,12;55. Last: 4,8,9,3;24. (b) Starting just clockwise from the top, the eight sectors read 11,14,16,17,22,?,8,34. (c) Each diamond lists top,left,right,bottom: (7,4,2,6), (9,8,1,9), (5,1,5,3), (6,1,?,2).

Question illustration

Answer entry: enter (a);(b);(c), separated by semicolons.

**Editorial input note:** Use no spaces before or after semicolons.