If you’re looking to re-sharpen your maths skills, then this tricky equation is perfect for you.
An exam question aimed at school children aged 10 to 11 is causing major problems for adults on US forum Reddit.
The complicated question has attracted thousands of attempts and almost 10,000 comments – with one adult saying it’s made them feel ‘really stupid’.
An anonymous user said it was a ‘test problem on my 5th grade brothers’ math exam’, before posting a screenshot of the sequence.
It read: ‘Klein read 30 pages of a book on Monday and 1/8 of the book on Tuesday. He completed the remaining 1/4 of the book on Wednesday. How many pages are there in the book?’
The question prompted many to take a stab at finding the right answer, while others appeared clearly frustrated.
Meanwhile some people went off down memory lane and discussed the calculation methods they used to complete maths homework while at school.
Perhaps even more hilarious, was that some users failed to complete the question, while others didn’t answer it at all.
Those who answered the question correctly explained that the logic was all in the ‘units’, as well as using a step by step break down to arrive at your answer.
Most adults unanimously agreed that the correct answer was 48 pages.
The top comment – liked 7,300 times – breaks down the correct answer: ‘one book = 30 pages + 1/8 book + 1/4 book. One book = 30 pages + 3/8 book. One book – 3/8 book = 30 pages. 5/8 book = 30 pages. One book = 48 pages’.
Agreeing with the answer, one person said: ‘Yeah, exactly. My mental process was he read the last 1/4 on Wednesday, so he must’ve read 3/4, which is 6/8 in the previous days. But he only read 1/8 on Tuesday. So he must’ve read the other 5/8 on Monday.
‘We’re told he read 30 pages on Monday. We know he read 5/8 of the book on Monday. So 30 pages = 5/8 of the book. So how much is an eighth of the book? We know 30 pages is 5/8. 30 pages divided by five is six pages. So a unit of six pages is 1/8 of the book. The book therefore is eight units of six pages which equals eight multiplied by six = 48 pages long’.
‘Kudos for showing units’ replied one. ‘This is the clearest answer’ responded another.
Meanwhile the test question made one person feel ‘stupid’: ‘I’m feeling really stupid right now because I can’t for the life of me understand how you guys get 5/8 from 30’.
In an updated post they continued: ‘Thank you everyone for your responses. Still feeling a little stupid but not as much’.
Someone else was left baffled: ‘This took me so long to see. For the longest time I thought it was just that he read another 1/4 on Wednesday, and I was baffled how anyone could get the books actual length from this’.
One person joked: ‘Why didn’t Klein just read the remaining 18 pages on Monday? Klein is lazy’.