School may seem like a long time ago, but everyone remembers the subjects they loathed - and for many, maths was the one lesson that sent shivers down your spine.
Some parents find it a complete breeze helping their children with maths homework, but there are a few questions making even the brainiest of adults scratch their heads.
GCSE questions seem to be getting harder and harder - and that's not just an excuse teenagers use, as research from from Save My Exams found that parents are unable to complete one mind-boggling GCSE maths question.
The question, which 100 per cent of parents got wrong, showed how difficult these exam papers can be - can you work it out?
Of the 1,000 parents quizzed, 92 per cent were unable to answer the question and 8 per cent failed to get the correct answer. Yet, an average of 75 per cent of these parents still believed they could pass their children's exams. One in two did (52 per cent) admit they don't always understand the homework questions their children are set, though.
Inside WW1 military hospital abandoned for decades before new lease of lifeThe GCSE maths question that the parents failed shows a shape with all its measurements in centimetres, where the area of the shape is A cm² and respondents are asked to show that A = 2x² + 24x + 46.
Thankfully, Save My Exams' maths lead Lucy Kirkham has worked out the answer for anyone left stuck by the question. Sharing advice, Lucy said: "Seeing questions with loads of Algebra can be scary but breaking them down into smaller chunks will help you work through them more easily.
"Our maths experts at Save My Exams create colour-coded model answers which break down each question into easier steps to carefully guide users to the correct answer.
"This question gives you the answer you're working towards, which can sometimes be off-putting as you wonder 'How am I ever going to get there?'. Don't let it worry you, just try to start with the first step and you'll surprise yourself with how far you can get!
"Even if you don't get all the way through, marks are awarded for different stages of your working so you can always try to pick up some marks and use our model answers to see how you'd pick up the rest."
It is not just maths that confuses parents, however, though it ranked as the worst subject. According to the research by Save My Exams, parents struggled the most with Maths (53%), followed by Science (35%), Spanish (30%), French (29%) and English Literature (27 per cent).
The good news is there's hope, as even the most complex of subjects can be taught well, provided teachers are given the right resources to connect with their students. What's more, several Mirror readers aced the troublesome maths question on the first go.
One reader said: "I just did it in a few minutes. I'm glad I can remember how to do this. Gives me confidence I'll be able to help my kids do this sort of thing when they get to it.
"I imagine the people who are stumped just don't understand what the question is asking. Once a few rules are explained most people could do it." A second replied: "Provided people remember the hierarchy of operators and approach the problem logically it should not present any difficulties."
UK's first non-binary priest says God guided them to come out after an epiphanyMeanwhile, a former teacher said they believe it's people's attitudes towards maths that needs addressing, as many struggle to believe in their abilities.
"I well remember coping with kids who had been convinced they were 'too thick' to do maths. One incident was dealing with a very disruptive 15 year old who had a reputation as 'tough'," wrote the mathematician. "I formed a real bond with him, how? I taught him to do simple sums, and ignored the 'curriculum' to give him pages of sums. His joy at getting something right was touching, and he was never disruptive in my class."
Did you get the right answer? Let us know in the comments