The following questions have three statements. Study the question and the statements and decide which of the statement(s) is/are necessary to answer the question.
If n is a three-digit positive integer, what is the sum of the digits of n?
Statement I: The hundredth digit of n is 3 times the unit digit.
Statement II: n is divisible by 7.
Statement III: The hundredth digit of n is 3 more than the tens digit.
1
Statement I and II together are sufficient to answer the question.
2
All three statements together are not sufficient to answer the question.
3
Statement II and either statement I or II are required to answer the question.
4
Statement II and III together are sufficient to answer the question.
5
All three statements together are required to answer the question.