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Why can you not make a sudoku puzzle with all prime numbers?
I am assuming you are referring to a normal 3x3 sudoku grid, where you can only use the numbers 1-9 once in the grid, and by prime number you mean the 3digit number across and down the grid must be prime? For a number to be prime, it must end in 1, 3, 7 or 9. There are 5 places on the Sudoku grid for a number to finish and as you can only use a number once in sudoku you have one place left where the number can not be prime. This means the most you can have is 5 prime numbers.
Use digits and a comaprison symbol to show that the decimal number five tenths equals the fraction one half?
5/10 = 1/2
How can you use a decimal to calculate the percent of a number?
Yes you can.
When do you use decimal?
When you divide a number by another number that isn't a factor of the first number.
Why do you use decimal for?
A decimal number is simply a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. A decimal representation does not require a decimal point.
