London, July 1 : British adults, it seems, weren't paying much attention to their lessons during school days, for according to a new survey, a majority of them struggle to answer questions fit for today's seven-year-old.
The study revealed that only one-in-20 was correctly able to answer 10 questions taken from primary school syllabuses.
The research also found that most adults were stumped by the correct spelling of a basic word - skilful - with only 23 per cent getting it right.
More than six-in-10 people quizzed also failed to identify the planet closest to the sun, the study revealed.
The questions - given to 2,180 adults this month - were adapted from the curriculum for seven to 11-year-olds in England.
According to the study, three per cent of adults got just one question correct, while the average person aged over 18 rightly answered just six.
Of those failing to spell the word "skilful", the most common mistake was using too many 'Ls', researchers said.
Only half were able to identify the capital of Sweden, with many people wrongly answering Oslo, Gothenburg or Helsinki.
Some 12 per cent suggested that Shakespeare's first name was Walter and seven per cent said that Henry VIII was on the throne in 1900.
Adults in the North West of England were the worst performers - correctly answering an average of three questions - while most people in the South East and South West scored seven.
"Considering that these questions could be answered by at least a seven-year-old, you might say the test was easy and so an average score of six out of 10 is pretty weak. It's not that any of the questions were particularly difficult, we have all been taught this information, it is retaining the knowledge that is the hard bit," the Telegraph quoted ndy Salmon, founder of thinkalink.co.uk, the general knowledge website which carried out the research, as saying.