# GCSE Mathematics Paper 2 The Final Step!!!. These are calculators!!!.

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GCSE Mathematics Paper 2 The Final Step!!!

These are calculators!!!.

MULTIPLY Times Lots of Product DIVIDE Share Divisible by 35 2 8 1 7 6 21 180 290 2 45 etc

Area & Perimeter Add up edges Answer in cm Area = Length x width Answer in cm 2

Area = HALF base x height ORBase x Height 2 AREA Answer in cm 2

Circle Circumference Area  x d  x r 2

Volume width height length Volume = length x width x height Units cm 3, m 3

DST D ST Distance Speed Time Be aware of units 2hrs 30 mins = 2.5 hours

Ratios total = 10 450 ÷ 10 = 45 2 parts 2 x 45 = 90 etc Share £450 in ratio 2:3:5

Fraction of … ‘Divide by bottom and times by top’ 1 / 7 of … Divide amount by 7 3 / 7 of … Divide amount by 7 and times by 3

“Percent ” out of 100 Percent with a calculator % x amount 100 EG: 36% of £156 36 x 156 100

Interest Simple Find % x number of years Compound Interest on interest

Angles 180º same size

Bearings Measured clockwise from north N Three figures e.g. 075º, 223º

Transformations Rotation Translation Use the tracing paper! Careful of points of movement

Probability Table of values Expected number of winners... Probability x number in Q

GROUPED FREQ Diagram ‘Bar graph’ Normal scale Bars as wide as the group

FREQUENCY POLYGON Plot at the MIDPOINT and FREQ Normal scale going up in 5, 10, 20 etc NOT groups

Mean Mean = sum of values total freq Grouped data sum of MIDPOINT x freq total freq

Scatter Graphs x x x x x x x x x Correlation Positive Negative

Graphs y = -x y = x y = x 2

Pythagoras Side lengths only Hypotenuse ‘longest side’ a b c c 2 = a 2 + b 2 Square it Add ‘em Square root it

Read every question carefully If you can do a question, Do it correctly! If struggling with a question, go onto the next and come back If time, check through each answer Good Luck

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