Practice Questions
Concept Explanation
Time-based DI tracks values across months, quarters, or years. Focus on trends, period totals, and period-to-period change.
Key Calculations
- Period total = sum over the time range.
- YoY change = this year − last year (same period).
- QoQ growth = (current quarter − previous) ÷ previous × 100.
- CAGR concept: compare start and end values over equal intervals.
Example
Q1 = 100, Q2 = 120. QoQ growth = (20/100) × 100 = 20%.
Common Trap
Quarter labels must align (Q1 2021 vs Q1 2020 for YoY, not Q1 vs Q2).
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Q1 Easy
Monthly sales: Jan = 80, Feb = 100, Mar = 120. Q1 total is:
Explanation80 + 100 + 120 = 300. -
Q2 Easy
Year 2019 = 400, Year 2020 = 480. YoY increase is:
Explanation480 − 400 = 80. -
Q3 Medium
Q1 = 100, Q2 = 120. Quarter-on-quarter growth is:
Explanation(20/100) × 100 = 20%. -
Q4 Hard
2018 = 250, 2019 = 300, 2020 = 360. Each year grew by the same percentage. Rate is:
Explanation250 to 300: +20%; 300 to 360: +20%. -
Q5 Easy
Half-year: H1 months 60, 80, 100. H1 total is:
Explanation60 + 80 + 100 = 240. -
Q6 Medium
Apr = 90, May = 108. May is what % more than Apr?
Explanation(18/90) × 100 = 20%. -
Q7 Medium
2017 Q4 = 140, 2018 Q4 = 168. YoY Q4 growth is:
Explanation(28/140) × 100 = 20%.
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Q8 Easy
Four quarters: 110, 120, 130, 140. Annual total is:
Explanation110 + 120 + 130 + 140 = 500. -
Q9 Medium
Jan 2020 = 200, Jan 2021 = 240. YoY January growth is:
Explanation(40/200) × 100 = 20%. -
Q10 Easy
Weekly: W1 = 45, W2 = 54, W3 = 48, W4 = 63. Highest week is:
ExplanationW4 = 63 is maximum. -
Q11 Hard
2016–2019 totals: 400, 440, 484, 532. Pattern is 10% growth each year. 2019 over 2018 increase is:
Explanation484 × 0.10 = 48.4 ≈ 48; exact: 532 − 484 = 48. -
Q12 Medium
Morning = 120, Afternoon = 150, Evening = 90 in one day. Afternoon share of daily total is:
ExplanationTotal = 360. (150/360) × 100 = 41.67%, closest 40%. -
Q13 Medium
2015 = 500, 2016 = 450. Percentage decline is:
Explanation(50/500) × 100 = 10%. -
Q14 Hard
Q3 = 130, Q4 = 156. Q4 over Q3 growth rate is:
Explanation(26/130) × 100 = 20%.
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DS1 Easy
What is the Q1 total from Jan, Feb, Mar sales?
Statement IJan = 80, Feb = 100, Mar = 120.
Statement IIQ1 has three months.
ExplanationStatement I alone: Q1 total = 300. -
DS2 Medium
What is YoY growth from 2019 to 2020?
Statement I2019 = 400.
Statement II2020 = 480.
ExplanationNeed both years: increase = 80, growth = 20%.
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DS3 Easy
What is quarter-on-quarter growth from Q1 to Q2?
Statement IQ1 = 100.
Statement IIQ2 = 120.
ExplanationNeed both quarters: (20/100) × 100 = 20%. -
DS4 Easy
What is the annual total of four quarters?
Statement IQuarters are 110, 120, 130, 140.
Statement IIThe year has four quarters.
ExplanationStatement I alone: annual total = 500.