alanforde800Maximus wrote:
A lecture course consists of 595 students. The students are to be divided into discussion sections, each with an equal number of students.
Which of the following cannot be the number of students in a discussion section.
a) 17
b) 35
c) 45
d) 85
e) 119
Any number whose digits sum to a number divisible by 3 is itself divisible by 3. For example, 3,912 is divisible by 3 because the sum of its digits is 3 + 9 + 1 + 2 = 15, which is divisible by 3.
Since 5 + 9 + 5 = 19, we see that 595 is not a
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