Civil Service Arithmetic Ability Practice Test Results

Question 1
62% answer correctly
If n = 8 what`s the value of \\(9n^2 + 7n - 18\\) ?
632
650
520
614
Question 2
71% answer correctly
15 yards is how many feet?
45
15
30
49.20
Question 3
81% answer correctly
Which of the following is not a prime number?
13
17
10
23