SQA Exams 2000

Intermediate2 Answers

Paper 1 (non- calculator) Section A

A1 (a)

Score

Frequency

Cumulative Frequaency

5

2

2

6

3

5

7

1

6

8

2

8

9

2

10

(b) 6/10 or 3/5

A2 y = -2x + 10

A3 (3a - 5b)(3a + 5b)

A4 25 degrees

A5 (a) Q1=59; Median=61; Q2=62

(b) 50% of sample are in range 59-62, 60 is in range, reasonable claim but small sample

(c)

(d) 75% of sample are 60 or less, unreasonable claim if it's a large sample.

Paper 1 (non- calculator) Section B

B6 a = 2

B7 b = 2

B8 (a) a (b) (c)

Paper 1 (non- calculator) Section C

C6 Friday: £20.40; Saturday: £34.00; Total: £54.40; Yes (with £5.40 extra)

C7 (a) s = 20 (b) t = 5

Paper 2 Section A

A1 4.05 (3 sig figs)

A2 3x2 + 3x - 2

A3 59.4 cm (3 sig figs)

A4 Advantage: £45; Low Cost: £46.25; Advantage is cheaper by £1.25

A5 (a) 3x + 50y = 88.5 (b) 4x + 60y = 113 (c) £17 per day; £0.75 per litre

A6 (a) 34800 cm2 (b) 62.8 cm

A7 AB=6.25 metres

A8 Perimeter = 58.6 cm (3 sig figs)

Paper 2 Section B

B9 (a) (b) x =1.8 or -1.1

B10 (a) (3,20) (b) x = 3 (c) (6,11)

B11 (a) x = 14.5 or 165.5 (b) proof

Paper 2 Section C

C9 £570

C10 (a) £17500 (b) £2931.15

C11 89.4 seconds

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