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Grades 6, 7 and 8 - Math - Middle School - Numbers - Indices
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Avg score: 56% • Most missed: “How many days are there in 29 x 33 x 54 seconds?”

Cubed and squared are types of indices. By writing numbers as powers of a common base, multiplication and division can be turned into addition or subtraction of indices making calculations with large or small numbers easier, as long as you follow the Math rules.
 

Grades 6, 7 and 8 - Math - Middle School - Numbers - Indices
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10 Questions

1. What is the result of dividing 25 by 625?
2. What is the result of 27 ÷ 28?
3. What index number must follow 3 to give 6,561?
4. A pond plant doubles its surface area every four days. If it covered an area of 20 cm2 on 17th June, what is its area on 15th July?
5. What is the result of 16 x 64 as a power of 2?
6. What is 0.24 as a power of 5?
7. How many days are there in 29 x 33 x 54 seconds?
8. What is the result of 24 x 83?
9. How many liters will fill a cube of side length 25 cm?
10. John started a savings account with a deposit of £500 at 1.5% compound interest per year. How much (to the nearest 1p) is the account worth after three years?

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