The book says the following paragraph has 11 mistakes, but I can't find all of them. I have found only 10 mistakes.

Can you identify all 11 mistakes? The mistakes here include capital-letter errors and misuses of prepositions. Here I mark the mistakes I've found in bold.

Mathematics throughout history

Throughout history, people have done mathematical computations and kept accounts. in early times, people used groups of sticks or stones to help make calculations. Then the abacus was developed in china. This simple method represents the beginnings of data processing? As computational needs became more complicated, people developed more advanced technologies. On 1642, Blaise pascal developed the first simple adding machine in france. Later, in England in 1830, charles Babbage designed the first machine that did calculations and printed out the results. Finally, In the middle of the twentieth century, researchers at the University of pennsylvania built the first electronic computer. Today, of course, we have the computer to perform all kinds of advanced mathematical computations.

quirrellThen the abacus was developed in China. This simple method device represents the beginnings of data processing.

An abacus is not a method, it is a physical device.


This might be the classic trick question where the eleventh mistake is their telling you there are eleven when there are only ten. I would need to see the exact wording and layout of the original to be sure.

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quirrellMathematics throughout history

"history", uncapitalised, is not necessarily wrong. Capitalising the first letter of the first word only is a valid style for headings. It depends on the author's choice. By the way, another style is "Initial Capitals For All Words", in which case "Throughout" should have a capital too. Maybe that is the mysterious eleventh error?

 AlpheccaStars's reply was promoted to an answer.

In the book, the answer key shows the second sentence starting as "in early Times,' which accounts for two mistakes.

However, the paragraph in the activity does not reflect the capitalized 'T' and it is already a lower case one, so there is nothing to fix; therefore, there are only 10 mistakes left ('t' already having been fixed).

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What is that supposed to mean, papaya piano?