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Complete each statement by writing the missing value in the box - OCR - GCSE Maths - Question 3 - 2019 - Paper 1

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Complete each statement by writing the missing value in the box. (a) $$\frac{2}{5} = 4$$ (b) $$2^{\frac{1}{3}} = 3$$ (c) $$7 \times 7 \times 7 \times 7 = 7$... show full transcript

Worked Solution & Example Answer:Complete each statement by writing the missing value in the box - OCR - GCSE Maths - Question 3 - 2019 - Paper 1

Step 1

(a)

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Answer

To find the missing value in the statement 25=4\frac{2}{5} = 4, we need to isolate the unknown. We know that this equation implies a proportion where if 25\frac{2}{5} represents a certain number, we can express it as:

x=4×52x = \frac{4 \times 5}{2}

Calculating this gives:

x=202=10x = \frac{20}{2} = 10

Thus, the missing value is 10.

Step 2

(b)

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Answer

In the equation 213=32^{\frac{1}{3}} = 3, we can rewrite it to find the missing value. The cube root of 2 can be calculated as:

x=213x = 2^{\frac{1}{3}}

To match this with the value of 3, we can rewrite the cube root:

This directly implies:

213=32^{\frac{1}{3}} = 3

Therefore, the missing value is simply represented by $$2^{\frac{1}{3}}.$

Step 3

(c)

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Answer

For this multiplication statement 7×7×7×7=77 \times 7 \times 7 \times 7 = 7, it appears there’s a misunderstanding, as the left-hand side evaluates to:

74=24017^4 = 2401

So, the correct interpretation indicates:

This is not equal to 7. Hence, we need to establish that the equation actually should equate to:

x=7x = 7 as a claim, but it actually isn’t true. The multiplication simplifies to:

[\text{Thus, it should hold true: } 2401 \neq 7]

Thus, the statement provided does not hold as equations in mathematics should balance.

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