Question 11 mark
Question
Write as a decimal. 10 …… [1]
Mark scheme
1 0.8 1
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Cambridge IGCSE Mathematics (0580), Paper 1 (Core), October/November 2023. Read both free below, or download them. Done the paper? Get it marked by AI against this mark scheme.
0580_w23_qp_120580_w23_ms_120580/12/O/N/23
Each question as it's printed, and the mark scheme's points for it, as text. Diagrams, tables and graphs are in the PDFs above.
Question
Write as a decimal. 10 …… [1]
Mark scheme
1 0.8 1
Question
Asha works in a café. Her wage is calculated using the formula wage = hourly rate # number of hours + bonus. Her hourly rate is $11.52 . One week Asha works 25 hours and receives a bonus of $5.40 . Work out her wage for this week. $ …… [2]
Mark scheme
2 293.40 2 M1 for 11.52 × 25 + 5.4
Question
These are the first four terms in a sequence. -3 4 11 18 (a) Find the next term. …… [1] (b) Explain how you worked out your answer. …… [1] 2
Mark scheme
3(a) 25 1 3(b) Added 7 oe 1
Question
Work out of 180. 5 …… [1]
Mark scheme
4 72 1
Question
Write these numbers in order, starting with the smallest. 3 9 18.7% 0.19 16 50 …… 1 …… 1 …… 1 …… [2] smallest
Mark scheme
5 9 3 2 B1 for 3 in the correct order 18.7[%] 0.19 or M1 for 0 .1875, 0.187 and 0 .18 50 16 or 18.75%, 18.7% and 18%
Question
Write down the number that is 9 greater than - 23. …… [1]
Mark scheme
6 –14 1
Question
For 16 days, Safia records the number of dresses she sells. 24 6 18 14 27 37 9 16 22 17 16 16 24 20 15 32 (a) Complete the stem-and-leaf diagram. 0 1 2 3 Key: 2 4 represents 24 dresses [2] (b) Write down the mode. …… [1] (c) Find the median. …… [1]
Mark scheme
7(a) 2 B1 for two or three rows correct or for a fully 0 6 9 correct unordered stem-and-leaf diagram or 1 4 5 6 6 6 7 8 for a correct diagram with one error or omission 2 0 2 4 4 7 3 2 7 7(b) 16 1 7(c) 17.5 1
Question
Write 24.07839 (a) correct to 2 decimal places …… [1] (b) correct to the nearest 10. …… [1]
Mark scheme
8(a) 24.08 cao 1 8(b) 20 cao 1
Question
v = u + at Find the value of v when u = 30 , a =- 2 and t = 7 . v = …… [2]
Mark scheme
9 16 2 M1 for 30 – 2 × 7 or B1 for –14
Question
Change 62 000 millimetres into kilometres. …… km [1]
Mark scheme
10 0.062 1
Question
50° x° NOT TO SCALE 114° The diagram shows two straight lines crossing two parallel lines. Find the value of x. x = …… [2]
Mark scheme
11 64 2 B1 for any of these angles labelled on the diagram. M1 for 114 – 50 or better
Question
(a) Explain why 111 is not a prime number. …… [1] (b) Find a prime number between 110 and 120. …… [1]
Mark scheme
12(a) Multiple of 3 or multiple of 37 1 12(b) 113 1
Question
North NOT TO North SCALE P 39° Q East Find the bearing of Q from P. …… [2]
Mark scheme
13 231 2 B1 for any of these angles in correct place on the diagram 51 or 129 or 141 between east line drawn from P to PQ or 39 between west line dawn from P to PQ or indicating the correct bearing of Q from P on the diagram. or M1 for 180 + (90 – 39) oe or 360 – (90 + 39)
Question
(a) As the age of a car increases, the selling price decreases. What type of correlation is this? …… [1] (b) Write down the type of correlation there is between the height of a driver and the value of their car. …… [1]
Mark scheme
14(a) Negative 1 14(b) No correlation 1
Question
Calculate the interior angle of a regular 9-sided polygon. …… [2]
Mark scheme
15 140 2 180 × ( 9 − 2 ) 360 M1 for or 180 – 9 9
Question
Filip invests $4000 for 3 years at a rate of 2.5% per year simple interest. Calculate the value of his investment at the end of the 3 years. $ …… [3]
Mark scheme
16 4300 3 B2 for 300 4000 ×2.5 ×[3] or M2 for 4000 + oe 100 4000 ×2.5 ×[3] or M1 for oe 100
Question
A B NOT TO O SCALE C A, B and C are points on a circle, centre O. (a) Draw a tangent to the circle at point A. [1] (b) The circumference of the circle is 22.3 cm. Calculate the radius of the circle. …… cm [2] (c) Give a geometrical reason why angle BCA is 90°. …… [1]
Mark scheme
17(a) Ruled tangent drawn at A 1 17(b) 3.55 or 3.548 to 3.549… 2 M1 for [r =] 22.3 ÷ 2π 17(c) Angle in a semicircle is 90º oe 1
Question
Expand and simplify. 2 (t + w) + 3 (w - t) …… [2] 1 3
Mark scheme
18 5w – t final answer 2 B1 for 2t + 2w or 3w – 3t or for 5w – t seen then spoiled or for 5w or – t in the final answer
Question
Without using a calculator, work out 3 - 1 . 8 4 You must show all your working and give your answer as a mixed number in its simplest form. …… [3] 20 = {students in a class} C = {students who play cricket} F = {students who play football} There are 36 students in the class. 15 students play cricket. 20 students play football. (a) C F 11 5 Complete the Venn diagram. [2] (b) Write down n (C , F) . …… [1]
Mark scheme
19 25 7 1 3 B1 Correct step for dealing with mixed numbers. or or 2 − 8 4 8 4 25k 7k Allow or 8k 4k 25 14 1 6 M1 Correct method to find a common and or [2] and denominator 8 8 8 8 1 6 e.g. 3 and1 8 8 3 A1 1 8
Question
In the question paper above.
Mark scheme
20(a) C F 2 B1 for 4 or 16 in correct place with no extras or for 4 and 16 in correct places with extras 4 16 20(b) 31 1 FT 11 + their 4 + their 16
Question
ABC is a right-angled triangle. A NOT TO SCALE 34° B 18 cm C Calculate AC. AC = …… cm [3]
Mark scheme
21 21.7 or 21.71… 3 18 M2 for [AC = ] oe cos34 18 or M1 for cos 34 = AC
Question
Point A and line L are shown on the grid. y 9 L 8 7 6 5 4 3 2 1 -3 -2 -1 0 1 2 3 x -1 -2 ×A -3 -4 (a) Write down the coordinates of point A. ( …… , …… ) [1] (b) On the grid, plot the point ( - 2 , 4). [1] (c) Find the equation of line L. …… [3]
Mark scheme
22(a) (1, –2) 1 22(b) Point plotted at (–2, 4) 1 22(c) y = 2x + 3 oe final answer 3 B2 for 2x + 3 or y = 2x + c or y = mx + 3 m ≠ 0 where m is their gradient or B1 for 2x + c or for mx + 3 m ≠ 0 where m is their gradient
Question
Bell A rings every 22 minutes. Bell B rings every 14 minutes. Both bells ring at 09 00. Work out the next time both bells ring together. …… [3]
Mark scheme
23 11 34 3 B2 for 154 or 2h 34 mins or M1 for 154k or 2 × 7 × 11 or for [22 = ]11 × 2 and [14 =] 7 × 2 or two correct factor trees/tables of both 22 and 14 OR M2 for listing times or multiples for both bells to at least 11 34 or 154 or M1 for listing 3 of each or one full list
Question
B NOT TO E SCALE 7.3 cm x cm A 5.5 cm C D 4.4 cm F Triangle ABC is mathematically similar to triangle DEF. Calculate the value of x. x = …… [2]
Mark scheme
24 5.84 2 x 4.4 M1 for = oe or better 7.3 5.5
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Mathematics 0580/12 for October/November 2023 is out of 56 marks, with 1 hour to answer it.
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