Part 9 of our Numerical Ability reviewer has 10 practice questions in the style of the Civil Service Exam. Answer them in order, read the explanation after each one, and check your score against the 80% passing mark at the end. Questions and choices are reshuffled every time you retake the part.
Start Part 9Sample questions from Part 9
Here are a few questions from this part. Take the full test to answer all 10 and get your score.
Sample question 1
2.12 is multiplied by 10 to the sixth power is?
- 212.000
- 2,120,000
- 212,000
- 21,200
Answer: 2,120,000
2,120,000 because 10 to the 6th power is in million
Sample question 2
25 is multiplied by 10 to the fifth power is?
- 2,500,000
- 250,000
- 25,000
- .000025
Answer: 2,500,000
2,500,000 because it is 25 x 100,000
Sample question 3
Find the value of x in the equation: 5x + 25 =10
- 5
- 3
- -5
- -3
Answer: -3
x = -3 because 5(-3) + 25 = 10
Sample question 4
If x=8, find the value of y in the equation: 4x – 2y = 28.
- -4
- -2
- 4
- 2
Answer: 2
y = 2 because 4 (8) – 2 (2) = 28
Sample question 5
Find the value of x if y= 8 in the equation: 2x + 4y = 50
- 9
- 8
- 10
- 4
Answer: 9
x = 9 because 2 (9) + 4(8) = 50