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Bennie is 7 years older than Ayesha - OCR - GCSE Maths - Question 25 - 2019 - Paper 1

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Question 25

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Bennie is 7 years older than Ayesha. Chloe is twice as old as Bennie. The sum of their three ages is 57. Work out the ages of Ayesha, Bennie and Chloe.

Worked Solution & Example Answer:Bennie is 7 years older than Ayesha - OCR - GCSE Maths - Question 25 - 2019 - Paper 1

Step 1

Define the variables

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Answer

Let A represent Ayesha's age. Then, based on the problem statement:

  • Bennie's age (B) is given by: B=A+7B = A + 7
  • Chloe's age (C) is given by: C=2BC = 2B

Step 2

Set up the equation

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Answer

According to the information provided, the sum of their ages is 57: A+B+C=57A + B + C = 57 Substituting for B and C, we get: A+(A+7)+2(A+7)=57A + (A + 7) + 2(A + 7) = 57

Step 3

Solve the equation

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Now, simplify the equation: A+(A+7)+2(A+7)=57A + (A + 7) + 2(A + 7) = 57 This simplifies to: A+A+7+2A+14=57A + A + 7 + 2A + 14 = 57 Combining like terms: 4A+21=574A + 21 = 57 Now, subtract 21 from both sides: 4A=364A = 36 Dividing both sides by 4 gives: A=9A = 9

Step 4

Calculate Bennie's age

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Answer

Now that we have Ayesha's age: A=9A = 9, we can find Bennie's age: B=A+7=9+7=16B = A + 7 = 9 + 7 = 16

Step 5

Calculate Chloe's age

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Answer

Finally, we can find Chloe's age: C=2B=2imes16=32C = 2B = 2 imes 16 = 32

Step 6

Summarize the ages

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Answer

In conclusion:

  • Ayesha's age is 9.
  • Bennie's age is 16.
  • Chloe's age is 32.

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