Photo AI
Patrick writes down a number - OCR - GCSE Maths - Question 4 - 2018 - Paper 1
Question 4
Patrick writes down a number. He says If I find the square root of that number and then add 15, I get 27. What number did Patrick write down?
Worked Solution & Example Answer:Patrick writes down a number - OCR - GCSE Maths - Question 4 - 2018 - Paper 1
Step 1
If I find the square root of that number and then add 15, I get 27.
Answer
To solve for the number that Patrick wrote down, we can set up the equation based on his statement:
Let the number be represented as . Then,
First, isolate the square root term:
This simplifies to:
Next, we square both sides to eliminate the square root:
Calculating this gives: