N9 calculate with and interpret standard form A × 10 , where 1 ≤ A < 10 and n is an integer Quiz: Pearson Edexcel Maths, Unit 1

The 20 questions

1. Write 5000 in standard form.

   • 0.5 × 10⁴
   • 50 × 10³
   • 5 × 10⁴
   • 5 × 10³

2. Write 0.00032 in standard form.

   • 3.2 × 10⁴
   • 32 × 10⁻⁵
   • 0.32 × 10⁻³
   • 3.2 × 10⁻⁴

3. In A × 10ⁿ, what range must A be in?

   • 1 ≤ A < 10
   • A > 10
   • 0 < A < 1
   • 10 ≤ A < 100

4. What is 4 × 10³ as an ordinary number?

   • 400
   • 40000
   • 40
   • 4000

5. Calculate (3 × 10⁴) × (2 × 10³) in standard form.

   • 5 × 10⁷
   • 6 × 10¹²
   • 6 × 10¹
   • 6 × 10⁷

6. Work out (8 × 10⁶) ÷ (2 × 10²) in standard form.

   • 6 × 10⁴
   • 4 × 10⁸
   • 4 × 10³
   • 4 × 10⁴

7. The Sun is 1.5 × 10⁸ km away. Write this as an ordinary number.

   • 150 000 000
   • 15 000 000
   • 1 500 000 000
   • 15 000 000 000

8. Write 0.0056 in standard form.

   • 0.56 × 10⁻²
   • 56 × 10⁻⁴
   • 5.6 × 10³
   • 5.6 × 10⁻³

9. Which standard form value is the largest?

   • 3 × 10⁴
   • 2 × 10⁵
   • 1 × 10⁵
   • 9 × 10³

10. Work out (4 × 10³) + (5 × 10²) in standard form.

    • 9 × 10³
    • 4.5 × 10³
    • 4.05 × 10³
    • 9 × 10⁵

11. A number is 6.2 × 10⁻². What is its value?

    • 0.62
    • 0.062
    • 62
    • 0.0062

12. Calculate (2.4 × 10⁵) × (3 × 10⁻²) in standard form.

    • 5.4 × 10³
    • 7.2 × 10⁻³
    • 7.2 × 10¹⁰
    • 7.2 × 10³

13. Work out (6 × 10⁸) ÷ (3 × 10⁻²) in standard form.

    • 2 × 10⁻¹⁰
    • 2 × 10⁶
    • 2 × 10¹⁰
    • 3 × 10¹⁰

14. Light travels at 3 × 10⁸ m/s. How long in seconds does it take to travel 1.5 × 10¹¹ m?

    • 2 × 10³ s
    • 5 × 10³ s
    • 4.5 × 10¹⁹ s
    • 5 × 10² s

15. Work out 3.6 × 10⁴ − 2.1 × 10³ in standard form.

    • 3.39 × 10⁴
    • 1.5 × 10⁴
    • 3.39 × 10³
    • 1.5 × 10¹

16. Which is the value of 10⁻⁴ × 10⁶?

    • 10¹⁰
    • 10²
    • 10⁻¹⁰
    • 10⁻²⁴

17. Two masses are 1.2 × 10³ kg and 8 × 10² kg. What is their total in standard form?

    • 9.6 × 10⁵ kg
    • 2 × 10² kg
    • 2 × 10³ kg
    • 2.8 × 10⁶ kg

18. Write 0.000 000 08 in standard form.

    • 8 × 10⁷
    • 80 × 10⁻⁹
    • 8 × 10⁻⁸
    • 0.8 × 10⁻⁷

19. Which of these is NOT written in standard form?

    • 3 × 10⁵
    • 9.9 × 10⁻²
    • 1 × 10⁰
    • 12 × 10³

20. Work out (1.6 × 10⁴)² in standard form.

    • 2.56 × 10⁸
    • 3.2 × 10⁸
    • 1.6 × 10⁸
    • 2.56 × 10⁴

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