Skills that are commonly tested at Grade B€¦ · · 2014-12-02The graph shows the cost of gas...
Transcript of Skills that are commonly tested at Grade B€¦ · · 2014-12-02The graph shows the cost of gas...
Skills that are commonly tested at Grade B on the Higher Level Paper
Cumulative Frequency (a) Copy and complete the cumulative frequency table.
(b) Draw a cumulative frequency diagram for your table. (c) Use the graph to find an estimate for the number of repairs which cost more than £700
(Total 6 marks)
Rearranging Formulae
Rearrange y = p – 2qx2 to make x the subject of the formula.
(Total 3 marks)
Solving Quadratics
The diagram shows the graph of y = x2 – 5x – 3
Use the graph to find estimates for the solutions of
(i) x2 – 5x – 3 = 0
(ii) x2 – 5x – 3 = 6 (Total 3 marks)
Simultaneous Equation Solve the simultaneous equations
3x + 4y = 200 2x + 3y = 144
(Total 4 marks)
Factorising and Solving Quadratics
(a) Factorise 2x2 – 9x + 4
(b) Hence, or otherwise, solve
2x2 – 9x + 4 = (2x – 1)2
(Total 3 marks)
Circle Theorems
AB is a diameter of a circle. C is a point on the circle. D is the point inside the circle such that BD = BC and BD is parallel to CA. Find the size of angle CDB. You must give reasons for your answer.
(Total 4 marks)
Standard Index Form
(a) Work out the value of (6 × 108) × (4 × 107) Give your answer in standard form.
(b) Work out the value of (6 × 108) + (4 × 107) Give your answer in standard form.
(Total 3 marks)
Inequalities and regions On the grid draw lines to show the region satisfied by the three inequalities. x+
x ≤ 4 y ≤ x
x+y ≥ 4
Label the region clearly with the letter R.
(Total 3 marks)
Box and Whisker Diagrams The diagram shows a box plot.
(a) Write down the median. (b) Work out the interquartile range.
(Total 2 marks)
Interpreting Real Life Graphs (Functional)
The graph shows the cost of gas from GasCo. £C is the cost of the gas and n is the number of units of gas used.
Use the graph to obtain a formula for C in terms of n.
(Total 3 marks)
Percentages
A car is advertised for £3000. The car will be in a sale next month.
Tom can afford to pay £2500. By what percentage will the price have to be reduced so that he can afford the car?
(Total 4 marks)
Trigonometry Here is a right-‐angled Triangle
(Total 3 marks)
Reverse Percentages In a sale normal prices are reduced by 20%. A washing machine has a sale price of £464 By how much money is the normal price of the washing machine reduced?
(Total 3 marks)
Similar Shapes
Triangle ABC is similar to triangle ADE. AC = 15 cm. CE = 6 cm. BC = 12.5 cm. Work out the length of DE.
(Total 3 marks)
Problem Solving Volume Question The diagram shows a solid metal cylinder.
(Total 4 marks)
The cylinder has base radius 2x and height 9x. The cylinder is melted down and made into a sphere of radius r. Find an expression for r in terms of x.
Calculate the size of angle marked x. Give your answer correct to 1 decimal place.