Part 25 of our Numerical Ability reviewer has 20 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 25Sample questions from Part 25
Here are a few questions from this part. Take the full test to answer all 20 and get your score.
Sample question 1
Subtract: 9/12 − 1/9 = ?
- 2/3
- 23/36
- 2/27
- 11/18
Answer: 23/36
LCD = 36. 9/12 = 27/36 and 1/9 = 4/36. Difference = 23/36.
Sample question 2
If 8 packs of noodles cost ₱160, how much will 16 packs cost at the same rate?
- ₱168
- ₱200
- ₱320
- ₱340
Answer: ₱320
Price per unit = ₱160 ÷ 8 = ₱20. 16 × ₱20 = ₱320.
Sample question 3
The ratio of sacks of rice to sacks of corn among goods in a warehouse is 24 : 20. What is this ratio in simplest form?
- 6 : 6
- 6 : 5
- 7 : 6
- 7 : 5
Answer: 6 : 5
Divide both terms by their GCF, 4: 24 : 20 = 6 : 5.
Sample question 4
Divide: 7/9 ÷ 2/3 = ?
- 1 2/9
- 6/7
- 1 1/6
- 1 2/19
Answer: 1 1/6
Multiply by the reciprocal of the divisor: 7/9 × 3/2 = 21/18 = 1 1/6.
Sample question 5
Express 9/20 as a decimal.
- 45
- 0.045
- 0.45
- 4.5
Answer: 0.45
Divide the numerator by the denominator: 9 ÷ 20 = 0.45.