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How is multiplying by 3 digit number similar to multiplying by 1 digit number?
3
What is thesmallest 3digit number with unique digits?
0.12 Or 102 if you do not want to include non integers.
Is the smallest 3digit is 1000?
The smallest 3 digit counting number less than 1000?? 100
How many 3digit numbers can be formed from digits320 with repetition?
18.You can answer it easily by considering three places for three digits of the number.The hundreds place cannot take zero hence it can take 2 values.The next two places can take all the three digits.Hence the total number of ways is 2*3*3=18.
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.
