1 is the most used digit because of 100
The only Difference i think is that Digit is the symbolic representation which is used to represent the numbers. while Number is the expression of quantity * * * * * The difference is like the difference between a word and a letter. Some words, such as I or a can be one letter long but most words are composed of a string of letters. Similarly, 5 or 7 are numbers as well as digits but 57 or 0.57 is a number but not a digit.
For a 3 digit number, the left most or the most significant digit cannot be zero. So it can be 1,2,3,4,5,6,7,8 or 9 which is 9 possibilities. The middle number can be 0,1,2,3,4,5,6,7,8,9 which is 10 possibilties but one of the digits has been chosen already as the first digit, so the possibilities are only 9. The right most number can be 0,1,2,3,4,5,6,7,8,9 which is 10 possibilities but two of the digits have been already used by the left most and the middle digits. That leaves only 8 possibilities. So the total number of three digit numbers that have three distinct digits is 9 x 9 x 8 = 81 x 8 = 648 possibilities
In the decimal number system, the highest valued digit is 9. The highest digit that ever appears in any one 'place' of a number is one less than the 'base' of the number. The numbers that everyone is most familiar with ... the numbers you see around you every day ... are numbers written in the 'decimal' system, using the 'base' of 10. So the highest digit in any one place is 9. 'Binary' numbers ... the form most used to represent numbers inside digital circuits and computers ... are constructed in base 2. So the highest digit in any one place is 1, and each of these numbers is just a string of 1's and zeros. Digits can be even higher than 9 in number systems that use other bases. For example, the hexadecimal system (often used in computer science to represent binary numbers) is base 16, so in that case the highest valued digit is "F" which has a value equivalent to 15 in a decimal representation. As an example, the number "FA" hexadecimal, has decimal value 15*16 + 10 = 250.
9
This is a question of permutations; the answer is equal to the factorial of 5 (number of digits) divided by the factorial of 3 (number used in each selection), written 5! / 3!. This equals 120 / 6, or 20 ways.
1
The digit (not didgit) 1.
1.
I'm pretty sure that I could figure it out, if I knew what numbers are on the 100-number grid.
Neither.
the digit 0
I would have to guess at 0 (zero) it will appear for all the multiples of 10 plus one extra for 100, making 11 in total.
101
The PLACE VALUE.
Every square of a 4 digit number has more than four digits.
Gh
Use the largest available digit possible starting with the hundred thousands digit, making the ones digit the largest even digit {0, 2, 4, 6, 8} that has not been used. The required number is: 987654