Starter quiz

  • A degree of accuracy shows how precise a ______ or measurement is. For example, to the nearest cm, nearest 10, 1 s.f. and so on.
    • 'number' ✓
  • Alex buys paper £4.95, USB £\square, stamps £5.20, crisps £0.95, staples £1.10 and plug £1.99. He pays with a £20 note and receives about £2 back in change. Estimate the cost of the USB.
    • £1
    • £2
    • £4  ✓
    • £6
    • £12
  • An error interval for a number y shows the range of possible values of y. It is written as:
    •  a< y < b
    • a> y < b
    • a \geq y
    • a\leq y < b  ✓
  • When a number, x, is rounded to the nearest integer the result is 88. Identify the error interval.
    •  87.5< x < 88.4 \dot 9
    • 87.5> x < 88.4 \dot 9
    • 87.5\leq x < 88.4 \dot 9
    • 87.5\leq x< 88.5  ✓
    • 87.5 \geq x <88.4 \dot 9
  • A triangle has lengths 3.5 cm (2 s.f), 4.1 cm (2 s.f) and 4.8 cm (2 s.f). Write the error interval for the perimeter p of the triangle.
    • 12.25 \leq p < 12.55  ✓
    • 12.2 \leq p < 12.5
    • 12.25 \leq p < 12.5599
    • 12.45 \leq p < 12.65
  • A square has lengths in centimetres to 1 decimal place. The error interval of the area of the square is 17.2225 \leq x <18.0625. Work out the length of the square to 1 d.p.
    • 3.8 cm
    • 4.0 cm
    • 4.2 cm  ✓
    • 4.4 cm
    • 4.6 cm
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