IGCSE Booklet 10 – Percentages and Interest | Original 17-page PDF

Exact unchanged original IGCSE Booklet 10 – Percentages and Interest | Original 17-page PDF.

Keep the original page, question and subpart numbers when following the matching lesson recordings. Each recording may cover selected examples; the complete PDF includes additional practice. This is the original teaching booklet, with its original historical labels and layout.

Spiral learning connection: connect these skills to earlier number, algebra and modelling ideas, then return to them in later problems.

Original-edition clarifications (the PDF itself is unchanged):

• Page 7, Q7: 41,200 × 1.04 = 42,848. The printed 42,800 is a three-significant-figure approximation.

• Page 11, class example (f): using the booklet’s stated 360-day year and fractional compound-interest model, t = log(5001/5000)/log(1.04) years. This is approximately 1 day, 20 hours, 3 minutes, 14.21 seconds; the printed 1 day, 20 hours, 9 minutes, 36 seconds is incorrect.

• The original interest and VAT rates are historical exercise data. Keep the stated 360-day convention when following the fractional-period examples.