Only one in five adults out of 2,000 who took a short spelling test were able to answer all five questions correctly.Sixty-five per cent failed to spell ‘necessary’ correctly while 33 per cent struggled with ‘definitely’ and ‘separate’. Our over reliance on computer spell checks has made us a nation unable to spell everyday words, a new survey has foundRespondents also admitted to extensive use of computer spell checks and auto-correct functions while writing emails and documents.Eighteen per cent said they used spell checks all the time, while a further 21 per cent relied on them most of the time.