IDAT Numerical Reasoning and Data Interpretation 1 — Questions and Answers
Question 1: A project team completes 40% of a task in 6 days. At the same rate, how many more days are needed to finish the remaining 60%?
- 9 days (Correct answer)
- 12 days
- 8 days
- 15 days
Correct answer: 9 days
40% takes 6 days, so 1% takes 0.15 days; 60% × 0.15 = 9 days.
Question 2: A table shows that Department A has 120 employees and Department B has 80 employees. What percentage of the total workforce does Department B represent?
- 40% (Correct answer)
- 60%
- 33%
- 25%
Correct answer: 40%
80 ÷ (120 + 80) × 100 = 80 ÷ 200 × 100 = 40%.
Question 3: If a budget of $54,000 is distributed among three teams in the ratio 2:3:4, how much does the team with the largest share receive?
- $24,000 (Correct answer)
- $18,000
- $12,000
- $27,000
Correct answer: $24,000
Total parts = 9; largest share = (4/9) × $54,000 = $24,000.
Question 4: Sales figures for Q1–Q4 are $12K, $15K, $18K, and $21K. What is the average quarterly sales figure?
- $16,500 (Correct answer)
- $17,000
- $15,500
- $18,000
Correct answer: $16,500
($12K + $15K + $18K + $21K) ÷ 4 = $66K ÷ 4 = $16,500.
Question 5: A report shows a country's GDP grew from $200 billion to $250 billion in one year. What is the percentage increase?
- 25% (Correct answer)
- 20%
- 50%
- 30%
Correct answer: 25%
Increase = $50B; percentage = (50/200) × 100 = 25%.
Question 6: A pie chart shows that 30% of an organization's budget is allocated to personnel. If the total budget is $2 million, how much is allocated to personnel?
- $600,000 (Correct answer)
- $300,000
- $200,000
- $400,000
Correct answer: $600,000
30% of $2,000,000 = 0.30 × $2,000,000 = $600,000.
Question 7: A data table shows output rates: Worker X produces 50 units/hour, Worker Y produces 30 units/hour. How many total units do they produce together in 4 hours?
- 320 units (Correct answer)
- 200 units
- 240 units
- 280 units
Correct answer: 320 units
Combined rate = 80 units/hour; 80 × 4 = 320 units.
IDAT Numerical Reasoning and Data Interpretation 1
A project team completes 40% of a task in 6 days.
At the same rate, how many more days are needed to finish the remaining 60%?