GCSE maths question is impossible to answer without 'cheat code' formula

GCSE maths question is impossible to answer without 'cheat code' formulaFor teenagers around the country GCSE exams are right around the corner, and students and parents alike need to know this 'cheat code' formula to help make difficult maths revision a breezeCommentsNewsZahna Eklund Senior Social News Reporter10:33, 17 Apr 2026Updated 10:34, 17 Apr 2026View ImageCan you solve the maths question? (stock image)(Image: Getty Images)GCSE exam season isn't far away, and maths students need to make sure they've got this formula in their back pocket. If you're gearing up to take your GCSEs in the next couple of months, or you're a parent of a teenager who is, you'll know that right now, revision is the most important thing.‌Students will have been taught everything they need to know for their exams, but retaining that knowledge isn't always easy - especially when it comes to things like specific maths formula. One maths GCSE question being shared on social media is leaving people scratching their heads as they struggle to work it out, but it can be made so much easier just by using one very easy formula that you need to remember for your exam.‌Saadat, a GCSE maths, English, and science tutor, shared the question in a TikTok video and said that many students end up losing "easy marks" on their exams as a result of forgetting the formula.‌The question concerned interior angles. In an exam, this topic will usually come up in a question that gives you a shape with some information about some of the interior angles. You will then have to work out the value of another of the angles using the information you've been given.In the question shared on TikTok, the shape was an irregular pentagram, with five angles of varying sizes. The following information is provided to work out the value of Angle A: "Angle A is the same as Angle C. Angle B is 155 degrees. Angle D is three times Angle C. Angle E is two times Ang...