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P6 Mathematics

Question post on Wed, 08/05/2019 6:56pm

Hi, please help to solve this problem. Thanks.

John Lim · Answer 1 · Post on Thu, 09/05/2019 12:43pm

John Lim Post on Thu, 09/05/2019 12:43pm

guess and check

64 + 1 = 65

64 + 4 = 69

64 + 16 = 81

4 x 4 = 16

ans. 4