Using 1, 2, and 3, you can make 27 whole numbers.
7^2=49
No 5291 is not a prime using 2 numbers. It is a prime using three numbers.
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.
1124 1224 1244
111,112,121,211,122,212,221,222,113,131,311,133,313,331,333,223,232,322,233,323,332,123, 132, 213, 231, 312, 321
2 is prime, its only factors are one and itself.
Using 1, 2, and 3, you can make 27 whole numbers.
eight
8 of them.
7^2=49
No 5291 is not a prime using 2 numbers. It is a prime using three numbers.
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.
there are 22
6, if you don't repeat any numbers.
24
1124 1224 1244