13 (a) 2a = \sqrt{b} where b is a positive integer from 8 to 17 - OCR - GCSE Maths - Question 13 - 2023 - Paper 3

If a were described simply as an integer without the restriction of being a positive integer, we would still find that the only integer value that satisfies the original equation occurs at b = 16, resulting in:

$a = 2$

However, having a just as an integer could theoretically allow for negative or zero values, but in the context of the given range for b (from 8 to 17), the equivalent value would still yield:

$a = 2$

Thus, the answer remains unchanged.