Practice Questions
Concept Explanation
Missing-data DI gives partial tables or charts with blanks. Use totals, averages, ratios, or percentages to find the unknown.
Techniques
- Row/column total: missing = total − known sum.
- Average given: total = average × count; find missing entry.
- Percentage given: part = (percent/100) × whole.
Example
Row total 500; entries 120, 180, ?. Missing = 500 − 300 = 200.
Common Trap
Check whether the blank is a single cell or an entire row/column total.
-
Q1 Easy
Row total 500; entries 120, 180, ?. Missing value is:
Explanation500 − 300 = 200. -
Q2 Easy
Column totals: Jan = 150, Feb = ?, Mar = 170; grand total 480. Feb is:
Explanation480 − 320 = 160. -
Q3 Easy
Three numbers average 40. Two are 35 and 45. Third is:
ExplanationTotal = 120. Third = 120 − 80 = 40. -
Q4 Easy
Pie total 600; sectors 120, 180, ?. Missing sector is:
Explanation600 − 300 = 300. -
Q5 Easy
Table: A = 90, B = ?, C = 110; total 320. B is:
Explanation320 − 200 = 120. -
Q6 Medium
Average of 5 numbers is 36. Known sum of four is 160. Fifth number is:
ExplanationTotal = 180. Fifth = 180 − 160 = 20. -
Q7 Medium
40% of total 750 is one category; another is 250; rest is ?. Rest is:
ExplanationFirst = 300. Rest = 750 − 550 = 200.
-
Q8 Medium
Ratio row 2 : 3 : 5; first = 80, third = 200. Middle missing if proportional is:
ExplanationOne part = 40. Middle = 3 × 40 = 120. -
Q9 Easy
Quarterly total 420; Q1 = 90, Q2 = 100, Q3 = 110. Q4 is:
Explanation420 − 300 = 120. -
Q10 Easy
Missing bar value: total of 4 bars = 360; three bars 70, 90, 110. Fourth is:
Explanation360 − 270 = 90. -
Q11 Hard
Two missing angles in a pie: known angles 80°, 100°, 120° and two equal unknowns. Each unknown is:
ExplanationRemaining = 360 − 300 = 60°. Each = 30°. -
Q12 Medium
Sales Mon–Thu: 50, 60, ?, 80; average 65. Wednesday is:
ExplanationTotal = 65 × 4 = 260. Wed = 260 − 190 = 70. -
Q13 Easy
Budget Rs. 1000 lakh: Rent 300, Salary ?, Travel 200. Salary is:
Explanation1000 − 500 = 500. -
Q14 Hard
Five products total 550; four are 80, 90, 110, 120. Fifth is:
Explanation550 − 400 = 150.
-
DS1 Easy
What is the missing value if row total is 500?
Statement IKnown entries are 120 and 180.
Statement IIRow total = 500.
ExplanationNeed both known entries and total: missing = 200. -
DS2 Easy
What is the third number if average of three is 40?
Statement ITwo numbers are 35 and 45.
Statement IISum of three numbers is 120.
ExplanationStatement I alone: third = 40.
-
DS3 Medium
What is Q4 if quarterly total is 420?
Statement IQ1 = 90, Q2 = 100, Q3 = 110.
Statement IIQ4 is the largest quarter.
ExplanationStatement I alone: Q4 = 120. -
DS4 Medium
What is Wednesday sales if Mon–Thu average is 65?
Statement IMon = 50, Tue = 60, Thu = 80.
Statement IIThere are four days in the set.
ExplanationNeed average and other three days: Wed = 70.