1 SPM FORECAST (Fully-worked Solutions) Form 5: Chapter 1 Number Bases Paper 1 1 Answer : D 2 Answer : C 3 5 2 + 5 + 3 = 1 × 5 2 + 1 × 5 1 + 3 × 5 0 ∴ 5 2 + 5 + 3 = 113 5 Answer : C 4 8 3 + 5 = 1 × 8 3 + 0 × 8 2 + 0 × 8 1 + 5 × 8 0 ∴ 8 3 + 5 = 1005 8 Answer : A 5 333 8 4 2 1 4 2 1 4 2 1 0 1 1 0 1 1 0 1 1 ∴ 333 8 = 11011011 2 Answer: A 5 2 5 1 5 0 1 1 3 8 3 8 2 8 1 8 0 1 0 0 5 0 10 0 1 0 102 1 1 0 1 0 0 2 – 1 1 1 2 1 0 1 1 0 1 2 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 0 0 1 2 – 1 0 1 1 2 1 0 1 1 0 2 1 1 1 Suc Math SPM (Forecast) F.indd 1 8/26/2009 10:42:29 AM