Solve Timed Logical and Quantitative Reasoning Cases
Quick Overview
Work through seven timed logic and quantitative cases involving implications, probability qualifiers, compound growth, work rates, and benefit calculations. The assessment rewards disciplined use of stated premises, auditable arithmetic, correct units, and willingness to flag an inconsistent answer choice.
Solve Timed Logical and Quantitative Reasoning Cases
Company: Epic
Role: Software Engineer
Category: Software Engineering Fundamentals
Difficulty: hard
Interview Round: Take-home Project
## Solve Timed Logical and Quantitative Reasoning Cases
Work through the seven short assessment cases below. For each reasoning case, use only the stated premises: do not turn “may,” “generally,” or “often” into a certainty. Show enough arithmetic to make every numerical answer auditable.
### Part 1 — Farm Relationships
Facts:
- Everyone who lives on the farm is related to X.
- A is X's brother.
- B lives on the farm.
Classify each statement as `true`, `false`, or `cannot determine`:
1. B is related to X.
2. A lives on the farm.
3. X lives on the farm.
#### What This Part Should Cover
- Apply the farm-resident implication only in its stated direction.
- Separate A's known family relationship from A's unknown residence.
- Avoid assuming that X lives wherever X's relatives live.
```hint Follow each implication in one direction
Write “lives on farm implies related to X” as an arrow before evaluating the three statements.
```
### Part 2 — Juvenile Case Classification
Assume the following material:
- Juvenile offenses often end in release with a fine or release without a fine.
- If a child is released without a fine, the court prohibits that child from seeking counseling.
- Release without a fine is generally used for a first offense.
- Ming is a first-time offender, and the court requires Ming to seek counseling.
Classify “Ming was released without a fine” as `definitely true`, `probably true`, `cannot determine`, `probably false`, or `definitely false`.
#### What This Part Should Cover
- Distinguish the exact consequence of no-fine release from the merely typical first-offense pattern.
- Reconcile the counseling requirement with the stated prohibition.
- Explain why being a first-time offender alone does not prove the release type.
```hint Look for a contradiction, not a correlation
Test the proposed release type against the required-counseling fact before using the weaker “generally” premise.
```
### Part 3 — Salary Steps
A position pays `13000` at step 1. Each move to the next step increases the previous step's salary by `10%`. What is the salary at step 4?
#### What This Part Should Cover
- Count how many increases occur between steps 1 and 4.
- Apply the percentage to the preceding step rather than repeatedly to the starting step.
- Give the exact result under the stated compounding rule.
```hint Count transitions
There are three moves: step 1 to 2, step 2 to 3, and step 3 to 4.
```
### Part 4 — Volunteer Funding
Material:
- If government funding increases, current volunteers will be paid.
- Paying volunteers may attract more volunteers in the future.
- Government funding has increased.
Classify “There will be no volunteers next year” using the five labels from Part 2.
#### What This Part Should Cover
- Derive the certain consequence for current volunteers.
- Treat “may attract” as a possibility, not a guarantee.
- Decide whether the premises determine next year's volunteer count.
```hint Keep time periods separate
The premises say what happens to current volunteers now but do not state who remains or joins next year.
```
### Part 5 — Acquisition and Purchase Volume
Material:
- If Company A acquires a smaller company, it may change its name and temporarily lower prices.
- If it temporarily lowers prices, purchase volume may increase.
- Company A acquired a smaller company.
Classify “Purchase volume increased” using the five labels from Part 2.
#### What This Part Should Cover
- Preserve both occurrences of “may.”
- Avoid chaining possible events as though they were guaranteed implications.
- State whether an observed acquisition determines an observed volume increase.
```hint Mark possibility words
Underline each “may” before attempting to chain the two sentences.
```
### Part 6 — Combined Work Rate
Worker A completes `72` units in `6` hours. Worker B completes `108` units in `6` hours. If they work together at constant independent rates, how long do they need to complete `60` units?
#### What This Part Should Cover
- Convert both totals to units per hour.
- Add rates, not completion times.
- Divide the required work by the combined rate and include units.
```hint Normalize first
Express each worker's output as units per hour before combining them.
```
### Part 7 — Benefit Payment
A four-person household has a basic standard of `420` and monthly income of `180`. Its countable income is the first `30` of income plus one third of all remaining income. The benefit equals `75%` of the basic standard minus countable income. Calculate the benefit. If the only numerical choice shown is `225`, explain whether to select it or `none of the above`.
#### What This Part Should Cover
- Split the income into the first `30` and the remaining amount.
- Apply one third only to the remaining amount.
- Compute the reduced standard before subtracting countable income.
- Compare the derived result with the available choice rather than forcing a match.
```hint Keep the two reductions separate
First calculate countable income; then calculate 75% of the standard; only then subtract.
```
### What a Strong Answer Covers
- Uses only the supplied implications and probability qualifiers.
- Shows calculations with the correct number of percentage steps and consistent units.
- Identifies when the premises are insufficient instead of guessing.
- Flags an inconsistent answer choice when the stated formula yields a different result.
### Follow-up Questions
1. Which conclusions would change if “may” were replaced by “will” in Parts 4 and 5?
2. How would Part 3 differ if every raise were `10%` of the step-1 salary instead of the previous step?
3. Which single premise in Part 2 is decisive for rejecting no-fine release?
4. What rounding rule would need to be specified if Part 7 produced fractional cents?
Quick Answer: Work through seven timed logic and quantitative cases involving implications, probability qualifiers, compound growth, work rates, and benefit calculations. The assessment rewards disciplined use of stated premises, auditable arithmetic, correct units, and willingness to flag an inconsistent answer choice.
Solve Timed Logical and Quantitative Reasoning Cases
Work through the seven short assessment cases below. For each reasoning case, use only the stated premises: do not turn “may,” “generally,” or “often” into a certainty. Show enough arithmetic to make every numerical answer auditable.
Part 1 — Farm Relationships
Facts:
Everyone who lives on the farm is related to X.
A is X's brother.
B lives on the farm.
Classify each statement as true, false, or cannot determine:
B is related to X.
A lives on the farm.
X lives on the farm.
What This Part Should Cover Guidance
Apply the farm-resident implication only in its stated direction.
Separate A's known family relationship from A's unknown residence.
Avoid assuming that X lives wherever X's relatives live.
Part 2 — Juvenile Case Classification
Assume the following material:
Juvenile offenses often end in release with a fine or release without a fine.
If a child is released without a fine, the court prohibits that child from seeking counseling.
Release without a fine is generally used for a first offense.
Ming is a first-time offender, and the court requires Ming to seek counseling.
Classify “Ming was released without a fine” as definitely true, probably true, cannot determine, probably false, or definitely false.
What This Part Should Cover Guidance
Distinguish the exact consequence of no-fine release from the merely typical first-offense pattern.
Reconcile the counseling requirement with the stated prohibition.
Explain why being a first-time offender alone does not prove the release type.
Part 3 — Salary Steps
A position pays 13000 at step 1. Each move to the next step increases the previous step's salary by 10%. What is the salary at step 4?
What This Part Should Cover Guidance
Count how many increases occur between steps 1 and 4.
Apply the percentage to the preceding step rather than repeatedly to the starting step.
Give the exact result under the stated compounding rule.
Part 4 — Volunteer Funding
Material:
If government funding increases, current volunteers will be paid.
Paying volunteers may attract more volunteers in the future.
Government funding has increased.
Classify “There will be no volunteers next year” using the five labels from Part 2.
What This Part Should Cover Guidance
Derive the certain consequence for current volunteers.
Treat “may attract” as a possibility, not a guarantee.
Decide whether the premises determine next year's volunteer count.
Part 5 — Acquisition and Purchase Volume
Material:
If Company A acquires a smaller company, it may change its name and temporarily lower prices.
If it temporarily lowers prices, purchase volume may increase.
Company A acquired a smaller company.
Classify “Purchase volume increased” using the five labels from Part 2.
What This Part Should Cover Guidance
Preserve both occurrences of “may.”
Avoid chaining possible events as though they were guaranteed implications.
State whether an observed acquisition determines an observed volume increase.
Part 6 — Combined Work Rate
Worker A completes 72 units in 6 hours. Worker B completes 108 units in 6 hours. If they work together at constant independent rates, how long do they need to complete 60 units?
What This Part Should Cover Guidance
Convert both totals to units per hour.
Add rates, not completion times.
Divide the required work by the combined rate and include units.
Part 7 — Benefit Payment
A four-person household has a basic standard of 420 and monthly income of 180. Its countable income is the first 30 of income plus one third of all remaining income. The benefit equals 75% of the basic standard minus countable income. Calculate the benefit. If the only numerical choice shown is 225, explain whether to select it or none of the above.
What This Part Should Cover Guidance
Split the income into the first
30
and the remaining amount.
Apply one third only to the remaining amount.
Compute the reduced standard before subtracting countable income.
Compare the derived result with the available choice rather than forcing a match.
What a Strong Answer Covers Guidance
Uses only the supplied implications and probability qualifiers.
Shows calculations with the correct number of percentage steps and consistent units.
Identifies when the premises are insufficient instead of guessing.
Flags an inconsistent answer choice when the stated formula yields a different result.
Follow-up Questions Guidance
Which conclusions would change if “may” were replaced by “will” in Parts 4 and 5?
How would Part 3 differ if every raise were
10%
of the step-1 salary instead of the previous step?
Which single premise in Part 2 is decisive for rejecting no-fine release?
What rounding rule would need to be specified if Part 7 produced fractional cents?