exactly 181
It's 4
77....724 where the 7 is repeated as many times as you like, making the number [possibly] infinite. However, I suspect the question requires a three digit number consisting of the digits of the set {2, 4, 7} used once each: 724
724
The divisibility rule for 3 is add up the digits and check for divisibility. 7+2+4 = 13.13 is not evenly divisible by 3 so 724 is not divisibleby 3.
exactly 181
724 divided by 4 is 181.
0.0055
181
9 x 724 = 6516
The factors of 724 are 1, 2, 4, 181, 362, and 724.
The factors of 724 are 1, 2, 4, 181, 362, and 724.
6686864
It's 4
364
724 ÷ 13 = 55 with remainder 9
The common factors are: 1, 2, 4