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Lintel Jan 1 - 7 25 questions
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Monday 4 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 322 + 344

    Answer: 322 + 344 = 666
  2. 2. Algebra

    Factorise fully: 25x² + 10x

    Answer: 5x(5x + 2)
  3. 3. Geometry

    Calculate the hypotenuse when a = 10cm and b = 5cm

    Answer: 11.18cm
  4. 4. Ratio

    Simplify the ratio 5m:500cm

    Answer: 1:100
  5. 5. Statistics

    Calculate the mean of: 33, 49, 48, 10, 7, 35

    Answer: 30.3

Tuesday 5 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 12 + 15 + 25

    Answer: 1110
  2. 2. Algebra

    What is the next term? 3, 9, 27, 81, ...

    Answer: 243
  3. 3. Geometry

    Adjacent = 26cm, hypotenuse = 32cm. Find the angle

    Answer: 35.7°
  4. 4. Ratio

    Simplify the ratio 7m:700cm

    Answer: 1:100
  5. 5. Statistics

    A spinner has 5 red, 4 blue and 6 green sections. Probability of landing on red?

    Answer: 13

Wednesday 6 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 166, 250, and 51

    Answer: 467
  2. 2. Algebra

    Solve: 3x = 27

    Answer: x = 9
  3. 3. Geometry

    Calculate the area of a circle with diameter 21cm

    Answer: 346.36cm²
  4. 4. Ratio

    Calculate 35.8% of 233

    Answer: 83.41
  5. 5. Statistics

    A spinner has 3 red, 4 blue and 2 green sections. Probability of landing on red?

    Answer: 13

Thursday 7 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    The sum of three consecutive numbers is 126. What are the numbers?

    Answer: 41, 42, and 43
  2. 2. Algebra

    Solve: x3 = 13.333333333333

    Answer: x = 40
  3. 3. Geometry

    Find c if a = 18cm and b = 14cm in a right triangle

    Answer: 22.8cm
  4. 4. Ratio

    Calculate 22.4% of 590

    Answer: 132.16
  5. 5. Statistics

    Calculate the mean of: 5, 18, 23, 18, 47, 29, 26

    Answer: 23.7

Friday 8 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    The temperature is -13°C. It rises by 8°C. What is the new temperature?

    Answer: -5°C
  2. 2. Algebra

    Solve: x5 = 3.8

    Answer: x = 19
  3. 3. Geometry

    A circle has area 706.9cm². Find its radius (dp)

    Answer: 15cm
  4. 4. Ratio

    Simplify the ratio 8m:800cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 6 red and 8 blue balls. What is the probability of picking a red ball?

    Answer: 37