write the largest number you can make using each of the digits 7,1,0,2, and 9 just once
2+(-2) =0
97A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 97 is the largest 2 digit prime number.
The smallest prime number between 0 and 30 is 2, and the largest is 29.
The highest number you can make out of the digits 2 4 0 and 1 is 4210.
When you add zero to a number you get the largest number as your answer, not 0. For example, 3*0=0 but 3+0=3.
543 210
348+301 can make 649
2
852
9,864,320
6,543,210