City of london school paper 1 by smoothmaths | Jun 19, 2020 | 0 comments Welcome to your City of London school 11+ paper Specimen Entrance Examination Mathematics 1. For this question you can do rough working on the left hand side of the page if required. Put answers only in the spaces on the right. 27400 27000 27300 20740 27200 2.74 × 10,000 = 27400 27000 27300 20740 27200 1.(b)\[13^{2}\] = 169 144 121 81 196 1.(c)The square root of 49 is ————— 7 8 9 6 5 1.(c) The cube root of 125 is ————— 5 7 6 8 9 1.(d) \[4^{3}\] = ————— 64 16 49 81 none of the above 1.(e) \[\frac{240}{300}\] in its simplest form is ———— \[\frac{4}{5}\] \[\frac{5}{4}\] \[\frac{3}{4}\] \[\frac{4}{3}\] \[\frac{1}{2}\] 1.(f) 25% of 68 = ——————— 17 20 25 15 10 1.(g) 43 × 38 = ————— 1634 1600 1620 1610 1590 2. The calculator display below shows\[\frac{2}{9}\] as a decimal.Complete the empty box to show how the calculator would display the answer to \[\frac{2}{900}\] . You do not need to write your digits in the same style, but you should use 10 digits. 0.002222222 0.02222222 0.222222222 0.00222 none of the above 3. I buy 7 drinks at 72p each, and 9 sandwiches at £1.21 each. How much change do I get from a £20 note? £4.07 £3.07 £1.07 £2.07 £5.07 4. Reflect the letters in the mirror line below. Three letters have been done for you. 5. Martin is given £240. He gives \[\frac{1}{8}\] to his sister and \[\frac{1}{5}\] of what remains to his little brother. How much does he keep himself? 168 138 178 210 200 6. The thermometers below show the temperature recorded at midday yesterday and midnight last night. 54 50 35 40 44 (i) What was the temperature midday yesterday in °F? ———— °F 54 44 40 50 35 6.(ii) What was the temperature midnight last night in °C? —–——— °C -6 -5 -8 0 -3 6.(iii) What was the difference in temperature between midday yesterday and midnight last night in °C? ————°C 18 16 20 10 12 7. How many minutes are there between 9.23 am and 1.06 pm? ——————minutes 223 200 215 186 217 8. (i) What fraction of the above design is shaded? Give your fraction in its simplest form. \[\frac{1}{3}\] \[\frac{3}{4}\] \[\frac{1}{2}\] \[\frac{3}{2}\] \[\frac{1}{4}\] 8.(ii) How many more of the hexagons need to be shaded so that \[\frac{3}{4}\] of the design is shaded? 5 4 3 2 1 8.(iii) What fraction of the large rectangle below is shaded? \[\frac{11}{6}\] or \[\frac{5}{8}\] \[\frac{8}{9}\] \[\frac{11}{10}\] \[\frac{5}{8}\] \[\frac{9}{16}\] 9. (i) Write 15% as a fraction in its simplest form. \[\frac{3}{20}\] \[\frac{5}{20}\] \[\frac{1}{20}\] \[\frac{1}{10}\] \[\frac{3}{10}\] 9.(ii) Rowan sends 7 text messages each day.A £5 credit buys him 140 text messages.Today he received an extra 15% free text messages when he bought his £5 credit.How many days should the credit last? Show your working. ————days 23 18 10 20 21 10. In a sponsored walk: Adam took 4 hours, 39 minutes; Billy took 274 minutes and Charlie took 4\[\frac{3}{5}\] hours. Who was quickest and who was the slowest? Quickest———— Slowest———— Billy Quickest, Adam Slowest Billy slowest, Adam Quickest Both are Slowest Both are Qucikest both a & b 11. The diagram below shows two overlapping rectangles. 11.(i) Calculate the area of the larger rectangle only. 360 \[cm^{2}\] 300\[cm^{2}\] 350\[cm^{2}\] 340\[cm^{2}\] 310\[cm^{2}\] 11.(ii) Calculate the total shaded area that the rectangles cover. ———— \[cm^{2}\] 448 \[cm^{2}\] 438 \[cm^{2}\] 450 \[cm^{2}\] 470 \[cm^{2}\] 468 \[cm^{2}\] 12. The diagram below shows a rectangle and a square. The diagrams are not drawn to scale. If they have equal perimeters, what is the difference in their area? ———— \[cm^{2}\] 400 \[cm^{2}\] 500 \[cm^{2}\] 600 \[cm^{2}\] 300 \[cm^{2}\] 200 \[cm^{2}\] 13. Calculate the size of the missing angle in this triangle. The diagram is not drawn to scale. —————° 62 72 78 64 70 14.(a) Find the size of angle 'a' in the diagram below. a=—————° 20 30 45 60 None of the above 14.(b) Would you describe 100°? Acute, obtuse or reflex Obtuse Bilatteral Acute Right Isosceleous 15. A right angled triangle is shown below. It is not drawn to scale. 15.(i) Calculate the perimeter of the triangle. —————cm 13.8 cm 10.8 cm 12.8 cm 8.8 None of the above 15.(ii) Calculate the area of the triangle. —————\[cm^{2}\] 7.5 6.5 5 4.5 3.8 16. The diagram above is not drawn to scale. 16.(i) A box measures 20cm by 11cm by 15cm. Calculate the volume of the box. —————\[cm^{3}\] 3300\[cm^{3}\] 3000\[cm^{3}\] 3200 \[cm^{3}\] 3100 \[cm^{3}\] 3400 \[cm^{3}\] 16.(ii) A string is tied around the box with a bow at the top as shown in the diagram. If the length of the bow is 8 cm, calculate the total length of string used. —————cm 130 cm 132 cm 122 cm 78 cm 120 cm 17. (ii) Cube numbers? %BLANK% 27 28 25 21 23 17.(iii) Square numbers? 25 22 24 26 28 17.(iv) Fibonacci numbers? The Fibonacci numbers follow the sequence 1, 1, 2, 3, 5, 8, 13… 21 22 24 23 27 17.(v) Triangular numbers? The triangular numbers follow the sequence 1, 3, 6, 10, 15, … 21 28 28 or 21 22 23 17.(vi) Perfect numbers?A perfect number is a number whose factors (not including itself) add up to itself. e.g. 6 is a perfect number because 1 + 2 + 3 = 6. 28 21 22 23 24 17.(vii) Powerful numbers?A powerful number has the property that for every prime number which divides into it, that prime number squared also divides into it. e.g. 16 is a powerful number because both 2 and 22 are factors. 25 or 27 25 27 28 29 18. What is 4 − ((4 + 4) ÷ 4)? 2 4 8 6 9 19. 1001=a×b×c where a, b and c are prime numbers, with c is bigger than b, and b bigger than a. Find a, b and c a = ————, b =————, c =———— a = 7,b = 11, c = 13 a = 8,b = 12, c = 14 a = 10,b = 13, c = 16 a = 6,b = 10, c = 12 a = 4,b = 8, c = 10 20. Given that 2357 × 99 = 233 343, find: (i) 233 343 ÷ 99 2357 2537 1357 5327 7325 20.(ii) 235∙7 × 99 23334.3 33324.3 3.2334 4333.2 33342 21. The symbol ⟴ has a special meaning in arithmetic. a ⟴ b means add a and b and then multiply by a. For example: 4 ⟴ 2 =4 × (4+2) =4 × 6 =24 21.(a) Work out 4 ⟴ 5 36 32 25 28 24 21.(b) Work out 4 ⟴ (3 ⟴ 2) 76 72 78 64 60 21.(c) Work out the value of p such that 6 ⟴ p =78 p=———— 7 6 5 4 9 22. Four bells ring at intervals of 2, 8, 7 and 11 seconds. If they are all rung at the same time, how many seconds will pass before they all ring at the same time again? You should show some justification for your answer. ———— seconds 616 416 516 510 610 Time's up
