Numerical Ability Reviewer Part 7 with Answers

Part 7 of our Numerical Ability reviewer has 15 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 7

Sample questions from Part 7

Here are a few questions from this part. Take the full test to answer all 15 and get your score.

Sample question 1

Mr. Cruz borrows Php750,000 from Asian Bank and is charged Php90,000 interest. What rate of interest did Asian Bank charge for the loan?

Answer: 12%

To find the rate of interest charged by Asian Bank for the loan, we can use the formula:

Rate of Interest = (Interest / Principal) × 100%

### Step 1: Insert the values into the formula.

Principal = Php 750,000
Interest = Php 90,000

Rate of Interest = (Php 90,000 / Php 750,000) × 100%

### Step 2: Calculate the fraction.

Rate of Interest = (90,000 / 750,000) = 0.12

### Step 3: Convert to a percentage.

Rate of Interest = 0.12 × 100% = 12%

### Conclusion

The rate of interest charged by Asian Bank for the loan is **12%**.

### Answer
d. 12%

Sample question 2

A store sells shirts for Php1,078 each or 3 for Php2,997. How much would one save by buying 3 shirts at a time instead of 3 shirts, one at a time?

Php237
Php921
Php1,237
Php1,921

Answer: Php237

To determine how much one would save by buying 3 shirts at a time instead of one at a time, we can follow these steps:

### Step 1: Calculate the cost of buying 3 shirts individually.

Cost of 1 shirt = Php 1,078
Cost of 3 shirts individually = 3 × Php 1,078
= Php 3,234

### Step 2: Calculate the cost of buying 3 shirts at the special price.

Cost of 3 shirts at the special price = Php 2,997

### Step 3: Calculate the savings.

Savings = Cost of 3 shirts individually - Cost of 3 shirts at the special price
= Php 3,234 - Php 2,997
= Php 237

### Conclusion

By buying 3 shirts at a time instead of one at a time, one would save **Php 237**.

### Answer
a. Php 237

Sample question 3

A computer can be rented for Php1,745 a week or Php 347.50 a day. You need the computer only for 6 days. At which rate (daily or weekly), would it be cheaper to rent and by how much cheaper?

weekly: Php340
daily: Php240
daily:Php340
weekly: Php240

Answer: weekly: Php340

To determine the cheaper rental option for the computer, we will calculate the total cost for both the weekly and daily rates for 6 days.

### Step 1: Calculate the cost of renting the computer daily.

Daily rate = Php 347.50
Total cost for 6 days = 6 × Php 347.50
= Php 2,085

### Step 2: Calculate the cost of renting the computer weekly.

Weekly rate = Php 1,745
Since you need the computer for 6 days, you would need to rent it for one week (7 days) as the weekly rate covers that period.
Total cost for 1 week = Php 1,745

### Step 3: Compare the two costs.

Daily cost for 6 days = Php 2,085
Weekly cost for 1 week = Php 1,745

### Step 4: Determine which is cheaper and by how much.

Savings = Daily cost - Weekly cost
= Php 2,085 - Php 1,745
= Php 340

### Conclusion

It is cheaper to rent the computer on a weekly basis by **Php 340**.

### Answer
a. weekly: Php 340

Sample question 4

A 1.25 kg of box of Brand A detergent sells for Php 87.50. A 1.5 kg box of Brand B detergent sells for Php103.20. What is the difference in the price per kg.?

Php 1.20
Php 1.50
Php 1.80
Php 2.00

Answer: Php 1.20

To find the difference in the price per kg of the two brands of detergent, we can follow these steps:

### Step 1: Calculate the price per kg for Brand A.

Brand A:
- Weight = 1.25 kg
- Price = Php 87.50

Price per kg for Brand A = Price / Weight
= Php 87.50 / 1.25 kg
= Php 70.00 per kg

### Step 2: Calculate the price per kg for Brand B.

Brand B:
- Weight = 1.5 kg
- Price = Php 103.20

Price per kg for Brand B = Price / Weight
= Php 103.20 / 1.5 kg
= Php 68.80 per kg

### Step 3: Calculate the difference in price per kg.

Difference = Price per kg of Brand A - Price per kg of Brand B
= Php 70.00 - Php 68.80
= Php 1.20

### Conclusion

The difference in the price per kg between Brand A and Brand B is **Php 1.20**.

### Answer
a. Php 1.20

Sample question 5

A 30-cm long plastic pipe costs Php249. At this rate, what is the price of the pipe
per meter?

Php 830
Php 840
Php 747
Php 749

Answer: Php 830

To find the price of the plastic pipe per meter, we can follow these steps:

### Step 1: Convert the length of the pipe from centimeters to meters.

Length of the pipe = 30 cm
1 meter = 100 cm
Length in meters = 30 cm / 100 cm/m = 0.3 m

### Step 2: Calculate the price per meter.

Price of the pipe = Php 249
Price per meter = Price / Length in meters
= Php 249 / 0.3 m
= Php 830

### Conclusion

The price of the pipe per meter is **Php 830**.

### Answer
a. Php 830

Numerical Ability Reviewer - Part 7