ECZ 2020 · GCE Paper 2 · Question 4 — Computer and Calculator
Question from ECZ 2020 · GCE Paper 2 · Question 4
(a) The programme below is given in the form of a pseudocode. Start Enter radius If radius < 0 Then display "error message" and re-enter positive radius Else enter slant height If slant height < 0 Then display "error message" and re-enter positive slant height Else Area = π * r * (r + slant height) End if Display Area Stop Draw the corresponding flow chart for the information given above.[5]
Verified working — step 1
Translate the pseudocode into a flowchart with two re-entry loops.(b) Express 2x - 1 - 31 - x as a single fraction in its simplest form.[3]
Verified working — step 1
Note that 1 - x = -(x - 1), so 31 - x = -3x - 1.The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.
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