What is Multiplication table?
[[File:De_Adam_Risen_Rechbuch_008.jpg|thumb|A multiplication table, by [[Adam Ries]] (1490s-1559)]] [[File:An_18th_century_set_of_Napier's_Bones.JPG|thumb|18th century version of [[Napier's bones]], a calculation device similar to an [[abacus]]]] A '''multiplication table''' is a tool used to learn how to [[multiply]] two numbers. The oldest known multiplication tables were written by the [[Babylon|Babylonians]] about 4000 years ago.<ref name=Qiu>{{cite journal | author = Jane Qiu | title = Ancient times table hidden in Chinese bamboo strips | journal = Nature News | date = January 7, 2014 | doi = 10.1038/nature.2014.14482 | s2cid = 130132289 | url = http://www.nature.com/news/ancient-times-table-hidden-in-chinese-bamboo-strips-1.14482}}</ref> Many people think it is important to know how to multiply two numbers by heart, usually up to 12 × 12, 30 × 30, 50 × 50, or 100 × 100. Most children are introduced to the two, five and 10 times tables by year two - at the age of six and seven. Between the age of seven and eight, children start to learn the three, four and eight times tables.<ref>{{Cite web|title=Nine-year-olds should recite times tables by heart, says Schools Minister|url=https://www.telegraph.co.uk/education/educationnews/11251221/Nine-year-olds-should-recite-times-tables-by-heart-says-Schools-Minister.html|access-date=2020-09-29|website=The Telegraph|language=en-GB}}</ref> The hardest multiplication is 6×8, which students got wrong 63% of the time. This was closely followed by 8×6, then 11×12, 12×8 and 8×12. The easiest multiplication, on the other hand, was 1×12, which students got wrong less than 5% of the time, followed by 1×6 and 9×1.<ref>{{Cite web|date=2014-02-21|title=Which times table do you find the hardest?|url=https://www.3plearning.com/blog/times-table-find-hardest/|access-date=2020-09-29|website=3P Learning|language=en-US|archive-date=2020-09-23|archive-url=https://web.archive.org/web/20200923051437/https://www.3plearning.com/blog/times-table-find-hardest/|url-status=dead}}</ref> In a mult