How much is 77 times 7?
629
539
749
519
He used the symbol of the period Gottfried Wilhelm Leibniz for the first time in his letter to John Bernoulli, writing that he did not like to use the (commonly used) × sign because he was often confused with the x sign, which denotes the unknown in the equation.
reach: rather globalcountingmathematicstechnology
Answers by country
629
539
749
519
answers
the United States
24
India
21
the Netherlands
11
Poland
12226
Germany
13
the United Kingdom
27
Australia
12