When did phone numbers become more than four digits?

Answer Those who remember the telephone party line system might remember when you could dial four digits to call someone. The four-number system was gradually phased out in the 1950s. Sometime around 1958... Read More »

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How to Find Sums of Digits?

The sum of digits, also termed arithmetically as digit sum, is simply a sum of all the digits constituting a number. The only catch is that if the sum of digits constituting a number is a number th... Read More »

How many threes are there in the first one million digits of pi?

The ratio of the circumference of a circle to its diameter is represented by pi. This number is an infinite decimal with no known repeating strings of numbers. The number three appears 100,230 time... Read More »

How to Divide Double Digits?

Dividing double digits is very similar to long division with a single-digit divisor, but it does require some extra multiplication and thinking.

How many digits are in a us phone numer?

Our phone numbers have 3 for the area code, 3 for the local office code and 4 unique digits for that one line. As said, ten total. If you are calling from outside of the US, you will need extra dig... Read More »