IDAT Numerical Reasoning and Data Interpretation 2 — Questions and Answers
Question 1: A bar chart shows that a country's exports rose from 400 to 460 units over one year. What is the percentage change?
- 15% (Correct answer)
- 10%
- 12%
- 20%
Correct answer: 15%
(460 − 400) ÷ 400 × 100 = 60 ÷ 400 × 100 = 15%.
Question 2: If an applicant's score increases by 12 points to reach 84, what was the original score?
- 72 (Correct answer)
- 70
- 76
- 68
Correct answer: 72
84 − 12 = 72.
Question 3: A line graph shows expenditure values of $5K, $8K, $6K, $9K, and $7K over five months. What is the median expenditure?
- $7K (Correct answer)
- $6K
- $8K
- $5K
Correct answer: $7K
Arranged in order: $5K, $6K, $7K, $8K, $9K; the middle (3rd) value is $7K.
Question 4: An office uses 240 reams of paper per month. If usage decreases by 15%, how many reams will be used per month?
- 204 reams (Correct answer)
- 196 reams
- 216 reams
- 210 reams
Correct answer: 204 reams
240 × 0.15 = 36; 240 − 36 = 204 reams.
Question 5: A table shows three project costs: $14,500; $22,300; and $8,200. What is the total combined cost?
- $45,000 (Correct answer)
- $44,500
- $43,800
- $46,000
Correct answer: $45,000
$14,500 + $22,300 + $8,200 = $45,000.
Question 6: If a candidate answers 63 out of 90 questions correctly, what is their score as a percentage (rounded to the nearest whole number)?
- 70% (Correct answer)
- 67%
- 72%
- 65%
Correct answer: 70%
63 ÷ 90 × 100 = 70%.
Question 7: A graph shows that Region A has 3 times the population of Region B. If Region B has 2.5 million people, what is the combined population of both regions?
- 10 million (Correct answer)
- 7.5 million
- 12.5 million
- 8 million
Correct answer: 10 million
Region A = 3 × 2.5M = 7.5M; combined = 7.5M + 2.5M = 10 million.
IDAT Numerical Reasoning and Data Interpretation 2
A bar chart shows that a country's exports rose from 400 to 460 units over one year.
What is the percentage change?