4 (a) Write down each of the following - OCR - GCSE Maths - Question 4 - 2018 - Paper 1
Question 4
4 (a) Write down each of the following.
(i) An even number.
(ii) A factor of 25.
(iii) A prime number between 10 and 20.
(iv) A cube number.
(b) Find the highes... show full transcript
Worked Solution & Example Answer:4 (a) Write down each of the following - OCR - GCSE Maths - Question 4 - 2018 - Paper 1
Step 1
Write down an even number.
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Answer
An even number is any integer that is divisible by 2. Common examples include 0, 2, 4, 6, 8, 10, etc. For this question, I can write down 2 as a valid even number.
Step 2
Write down a factor of 25.
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Answer
A factor of a number is an integer that divides that number without leaving a remainder. The factors of 25 are 1, 5, and 25. I can choose 5 as a factor of 25.
Step 3
Write down a prime number between 10 and 20.
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A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. The prime numbers between 10 and 20 are 11, 13, 17, and 19. I will write down 13.
Step 4
Write down a cube number.
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Answer
A cube number is a number that can be expressed as the cube of an integer. Examples include 1 (1³), 8 (2³), 27 (3³), and so on. I can write down 8 as a cube number.
Step 5
Find the highest common factor (HCF) of 35 and 91.
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Answer
To find the HCF, we can list the factors of each number:
