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Whiteboardmaths.com 7 2 1 5 © 2004 All rights reserved SHAPE HANDLING SPACE & M DATA NUMBER ALGEBRA E E D E D E D C B C B C B D C B oC 30o 20o 10o Put the following oC temperatures in order of size smallest to largest. 8 0o -10o Back to board -3 0 4 -10 Answer oC 30o 20o 10o Put the following oC temperatures in order of size smallest to largest. 8 0o -10o -3 0 4 - 10, -3, 0, 4, 8 Back to board Explain? -10 oC 30o 20o 10o Put the following oC temperatures in order of size smallest to largest. 8 0o -10o -3 0 4 - 10, -3, 0, 4, 8 Back to board -10 Write the improper fraction below as a mixed number. 23 8 Back to board Answer Write the improper fraction below as a mixed number. 23 8 2 Back to board 7 8 Jenny has £1000 in her building society account on 1st January 2006. The interest rate is fixed at 5%. She intends to leave the money in the account for 3 years without making any withdrawals. (a) What do you multiply the £1000 by to get the amount at the end of the first year? (b) What is balance for her account on 1st January 2009 . Date Amount Jan 1st 2006 £1000 Jan 1st 2007 Jan 1st 2008 Jan 1st 2009 Back to board Answer Jenny has £1000 in her building society account on 1st January 2006. The interest rate is fixed at 5%. She intends to leave the money in the account for 3 years without making any withdrawals. (a) What do you multiply the £1000 by to get the amount at the end of the first year? (b) What is balance for her account on 1st January 2009 . Date Amount Jan 1st 2006 £1000 (a) 1.05 Jan 1st 2007 Jan 1st 2008 Jan 1st 2009 Back to board Explain? (b) £1157.63 Jenny has £1000 in her building society account on 1st January 2006. The interest rate is fixed at 5%. She intends to leave the money in the account for 3 years without making any withdrawals. (a) What do you multiply the £1000 by to get the amount at the end of the first year? (b) What is balance for her account on 1st January 2009 . Date Amount Jan 1st 2006 £1000 Jan 1st 2007 £1050 Jan 1st 2008 Jan 1st 2009 £1102.50 £1157.63 (a) 1.05 x 1.05 (b) £1157.63 (a) An increase of 5% means that the new amount is 105% of the original value and a 105% = 105/100 = 1.05 as a multiplier. (b) Apply the multiplier repeatedly to get the new amount at the end of each year. Back to board Notice that 1000 x 1.053 gets the answer more efficiently. The table shows the birth rates per 1000 people in five countries as recorded in 1975 and 2005. In country A the birth rate fell by 24.6% in 2005. Use a multiplier to calculate the birth rate in country A for 2005 (1 dp). 1975 Back to board 2005 A 18.4 B 23.6 17.3 C 9.5 12.7 D 13.7 16.4 Answer The table shows the birth rates per 1000 people in five countries as recorded in 1975 and 2005. In country A the birth rate fell by 24.6% in 2005. Use a multiplier to calculate the birth rate in country A for 2005 (1 dp). 1975 2005 A 18.4 B 23.6 17.3 C 9.5 12.7 D 13.7 16.4 13.9 Back to board Explain? The table shows the birth rates per 1000 people in five countries as recorded in 1975 and 2005. In country A the birth rate fell by 24.6% in 2005. Use a multiplier to calculate the birth rate in country A for 2005 (1 dp). 1975 2005 A 18.4 B 23.6 17.3 C 9.5 12.7 D 13.7 16.4 18.4 x 0.754 =13.9 13.9 A percentage fall of 24.6% implies a new percentage of 75.4% = 0.754 Back to board The number sequence below is called the Fibonacci Sequence and is named after a mathematician who lived many hundreds of years ago. Each number in the sequence is the sum of the two previous numbers. Work out the next 3 numbers of this sequence. 1, 1, 2, 3, 5, 8,… Back to board Answer The number sequence below is called the Fibonacci Sequence and is named after a mathematician who lived many hundreds of years ago. Each number in the sequence is the sum of the two previous numbers. Work out the next 3 numbers of this sequence. 1, 1, 2, 3, 5, 8,… 13, 21, 34 Back to board The first 4 terms of a number sequence are shown below. Describe in words the rule that gives the nth term in the sequence. 1 2 3 4 ……… 4, 7, 10, 13,……… Back to board nth Answer The first 4 terms of a number sequence are shown below. Describe in words the rule that gives the nth term in the sequence. 1 2 3 4 ……… 4, 7, 10, 13,……… nth Multiply the term number by 3 and add 1 Back to board Simplify the expression below: 7 + 5(3x + 6) - 2(x + 4) - 3 Back to board Answer Simplify the expression below: 7 + 5(3x + 6) - 2(x + 4) - 3 13x + 26 Back to board Explain? Simplify the expression below: 7 + 5(3x + 6) - 2(x + 4) - 3 Expanding each bracket gives: 7 +15x + 30 - 2x - 8 - 3 Collecting like terms gives: 13x + 26 Back to board 13x + 26 Determine the inequality that describes the shaded region below. y 8 6 4 2 -8 -6 -4 -2 0 -2 2 4 6 8 x -4 -6 -8 Back to board Answer Determine the inequality that describes the shaded region below. y 8 6 4 2 -8 -6 -4 -2 0 -2 2 4 6 8 x -4 -6 -8 Back to board Explain? yx-2 Determine the inequality that describes the shaded region below. y 8 6 4 Equation of line is y = x - 2 2 -8 -6 -4 -2 0 -2 -4 -6 -8 Back to board 2 4 6 8 x For all points x and y within the region, y is x -2 yx-2 What is the order of rotational symmetry for the shape below? Back to board Answer What is the order of rotational symmetry for the shape below? 3 Back to board Explain? What is the order of rotational symmetry for the shape below? 3 2 Back to board 1 Match the congruent shapes. C B A D E Back to board F G Answer Match the congruent shapes. C B A D E Back to board F G Calculate the volume of the cylinder. (1 dp) 6 cm 8 cm Back to board Answer Calculate the volume of the cylinder. (1 dp) 6 cm 8 cm 904.8 cm3 Back to board Explain? Calculate the volume of the cylinder. (1 dp) 6 cm 8 cm Remember V = r2h Back to board V = x 62 x 8 = 904.8 cm3 Find the angle of elevation of the top of the statue (1 dp). 43.5 m 75 m Back to board Answer Find the angle of elevation of the top of the statue (1 dp). 43.5 m 30.1o 75 m Back to board Explain? Find the angle of elevation of the top of the statue (1 dp). 43.5 tan x 75 43.5 x tan 30.1o 75 1 43.5 m 30.1o Angle of elevation 75 m Back to board xo Prof and Beaky are playing a dart game at the fair. Beaky throws a dart at random at the cards. What is the probability that she hits a picture card? Back to board Answer Prof and Beaky are playing a dart game at the fair. Beaky throws a dart at random at the cards. What is the probability that she hits a picture card? 5/9 Back to board Explain? Prof and Beaky are playing a dart game at the fair. Beaky throws a dart at random at the cards. What is the probability that she hits a picture card? 5/9 5 of the cards are picture cards out of a total of 9 cards. Back to board Prof did a survey about the colour of cars passing underneath a motor way bridge. From the data he constructed the table of probabilities shown below. Use the table to calculate the probability that a car passing underneath the bridge will be silver. Red Blue White Silver Black 0.2 0.17 0.15 ? 0.1 Back to board Answer Prof did a survey about the colour of cars passing underneath a motor way bridge. From the data he constructed the table of probabilities shown below. Use the table to calculate the probability that a car passing underneath the bridge will be silver. Red Blue White Silver Black 0.2 0.17 0.15 ? 0.1 0.38 Back to board Explain? Prof did a survey about the colour of cars passing underneath a motor way bridge. From the data he constructed the table of probabilities shown below. Use the table to calculate the probability that a car passing underneath the bridge will be silver. Red Blue White Silver Black 0.2 0.17 0.15 ? 0.1 0.38 1 - (0.2 + 0.17 + 0.15 + 0.1) Remember: For mutually exclusive events the total of all probabilities is 1. Back to board Christmas raffle tickets are sold to students in a school as shown in the table below. (a) What is the probability that the winning ticket will be green? (b) What is the probability that the winning ticket will show the number 13? Back to board Ticket Colour Numbers used Year 7 red 1 to 85 Year 8 blue 1 to 80 Year 9 green 1 to 75 Answer Christmas raffle tickets are sold to students in a school as shown in the table below. (a) What is the probability that the winning ticket will be green? (b) What is the probability that the winning ticket will show the number 13? Ticket Colour Numbers used Year 7 red 1 to 85 Year 8 blue 1 to 80 Year 9 green 1 to 75 (a) 75/240 Back to board Explain? (b) 3/240 Christmas raffle tickets are sold to students in a school as shown in the table below. (a) What is the probability that the winning ticket will be green? (b) What is the probability that the winning ticket will show the number 13? Ticket Colour Numbers used Year 7 red 1 to 85 Year 8 blue 1 to 80 Year 9 green 1 to 75 (a) 75/240 (b) 3/240 (a) 75 tickets are green out of a total of 240. (b) There are 3 tickets numbered 13 out of a total of 240. Back to board The cumulative frequency curve gives information on aircraft arriving late at an airport. Use the curve to find the number of aircraft arriving less than 45 minutes late. Cumulative Frequency 60 50 40 30 20 10 0 Back to board 10 20 30 40 50 Minutes late 60 Answer The cumulative frequency curve gives information on aircraft arriving late at an airport. Use the curve to find the number of aircraft arriving less than 45 minutes late. Cumulative Frequency 60 50 40 30 20 10 0 Back to board 10 20 30 40 50 Minutes late Explain? 60 52 The cumulative frequency curve gives information on aircraft arriving late at an airport. Use the curve to find the number of aircraft arriving less than 45 minutes late. Cumulative Frequency 60 50 40 30 20 10 0 Back to board 10 20 30 40 50 Minutes late 60 52