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Mathematics is the door and key to the sciences.  ~ Roger Bacon

William wanted to buy a digital camera. He saved RM8 on the 1st day, RM16 on the 2nd day, RM32 on the 3rd day, RM64 on the 4th day and so on. After a week, William saved just enough money to buy the digital camera. How much did the digital camera cost?

Sample SMaths Challenge Question for Category Primary/Year 4


a) RM512                                                c) 508

b) RM1016                                              d) None of the above