maths revision

Question 1

in HCF with powers , what is the highest common factor?

Answer 1

the lowest power

Question 2

in LCM with powers , what is the lowest common multiple?

Answer 2

the highest power

Question 3

in addition and subtraction of algebraic fractions what do you do?

Answer 3

cross multiply, find a common denominator, solve

Question 4

in multiplication of algebraic fractions what do you do?

Answer 4

times across as normal, solve

Question 5

in division of algebraic fractions what do you do?

Answer 5

leave, change, flip, times across as normal, solve

Question 6

in a geometric sequence what does the AR mean?

Answer 6

a=first term and r = common ratio

Question 7

how do you work out the surface area of parallelogram?

Answer 7

base x perpendicular height

Question 8

how do you work out the surface area of trapezium?

Answer 8

top and bottom length /2 x height

Question 9

how do you work out the surface area of cylinder?

Answer 9

2(pie)r squared + 2(pie) r h

Question 10

how do you work out the surface area of cone?

Answer 10

(pie)r squared + (pie) rl

Question 11

how do you find a hidden angle when you know the area and radius of a sector?

Answer 11

? divided by 360 x pie x radius squared . go backwards in flow map

Question 12

how do you find the angle when you know the arc length and the radius of a sector?

Answer 12

? divided by 360 x pie x diameter. go backwards in flow map

Question 13

in a velocity time graph, what does a line going up mean?

Answer 13

acceleration

Question 14

in a velocity time graph, what does a straight line mean?

Answer 14

constant speed

Question 15

in a velocity time graph, how do you find distance travelled?

Answer 15

area under the graph

Question 16

in a velocity time graph, how do find acceleration?

Answer 16

acceleration = speed change divided by time

Question 17

what does y = x squared look like on a graph?

Answer 17

an upwards v shape

Question 18

what does y =-x squared look like on a graph?

Answer 18

an upside down v shape

Question 19

what does y= 1 divided by x look like on a graph?

Answer 19

symmetrical l shapes opposite each other

Question 20

what does it mean when the line doesn’t/ cant touch the axis?

Answer 20

asymptote

Question 21

what does y=2x look like on a graph?

Answer 21

straight line along the x axis that eventually goes up

Question 22

what does y= e to the power of x look like on a graph?

Answer 22

an asymptote line to the x axis that passes through one then gradually goes up

Question 23

when you need to divide and find the lower bound, what do you do?

Answer 23

divide lower by upper

Question 24

when you need to divide and find the upper bound, what do you do?

Answer 24

divide upper by lower

Question 25

when you need to subtract and find the lower bound, what do you do?

Answer 25

lower - upper

Question 26

when you need to subtract and find the upper bound, what do you do?

Answer 26

upper - lower

Question 27

how do you rationalise a surd denominator?

Answer 27

x the numerator and denominator by the surd on the bottom and if there’s a sign change the sign