Table DI

Quantitative Aptitude / DI · Core DI

Useful for: SSC CGL, IBPS Banking, REET, UPTET, BPSC TRE, UGC NET, Assistant Teacher Recruitment (Super TET), Bihar STET

and 18 more exams

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Overview

DI tests quick percentages, ratios and averages read from a table or chart — accurate reading matters more than heavy calculation.

Key points

Percentage change = (new − old)/old × 100.
Share in a pie chart: angle/360 × 100 %, or value = angle/360 × total.
Average across years = total ÷ number of years.
Ratio questions: write both values and simplify.
Use approximation when options are far apart.

Explanation

Check units (thousands, crores, %) before comparing.
Growth over several years: compare each year with its own previous year, not the first year, unless asked.
For "how many times", divide; for "how much more", subtract.
In mixed charts, read the legend carefully.

Step by step

Locate the data.
Apply percentage, ratio or average.
Check units in the answer.

Examples

Sales were 400 in 2019 and 500 in 2020: increase = 100/400 × 100 = 25%.
A pie-chart sector of 72° represents 72/360 × 100 = 20% of the total.
Values 120, 150, 180 over three years: average = 450/3 = 150.

Traps and advanced points

Trap: Using the new value as the base for percentage change.
Trap: Ignoring units such as "in thousands".
Trap: Reading a neighbouring bar or row.

Quick revision

% change on the old value.
Angle/360 for pie share.
Approximate when options differ widely.

Practice MCQs

A bank reports quarterly loan sanctions (₹ crore): Q1=254, Q2=186, Q3=178, Q4=252. What is the annual total?
1. 783
2. 1044
3. 870
4. 957
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Answer: (c) 870. Annual total = 254 + 186 + 178 + 252 = 870 crore.
A bank reports quarterly loan sanctions (₹ crore): Q1=259, Q2=196, Q3=193, Q4=212. What is the annual total?
1. 1032
2. 946
3. 860
4. 774
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Answer: (c) 860. Annual total = 259 + 196 + 193 + 212 = 860 crore.
A bank reports quarterly loan sanctions (₹ crore): Q1=265, Q2=190, Q3=175, Q4=290. What is the annual total?
1. 920
2. 1104
3. 1012
4. 828
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Answer: (a) 920. Annual total = 265 + 190 + 175 + 290 = 920 crore.
A bank reports quarterly loan sanctions (₹ crore): Q1=270, Q2=210, Q3=210, Q4=180. What is the annual total?
1. 1044
2. 957
3. 870
4. 783
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Answer: (c) 870. Annual total = 270 + 210 + 210 + 180 = 870 crore.
A bank reports quarterly loan sanctions (₹ crore): Q1=276, Q2=204, Q3=192, Q4=258. What is the annual total?
1. 930
2. 1023
3. 1116
4. 837
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Answer: (a) 930. Annual total = 276 + 204 + 192 + 258 = 930 crore.
In a pie chart, an item represents 25% of the total. The central angle of its sector is:
1. 120 degrees
2. 90 degrees
3. 25 degrees
4. 72 degrees
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Answer: (b) 90 degrees. Full pie = 360 degrees = 100%.
A sector in a pie chart has central angle 54 degrees. What percentage of the total does it represent?
1. 20%
2. 15%
3. 54%
4. 18%
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Answer: (b) 15%. % = (angle/360)×100 = (54/360)×100 = 15%.
Total sales are 7200 units across 4 products in ratio 3:4:5:6. The product with 4 parts sold:
1. 2000 units
2. 2400 units
3. 1600 units
4. 1200 units
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Answer: (c) 1600 units. Total parts = 3+4+5+6 = 18.
If a bar graph shows profits 20, 30, 25, 45 lakh over 4 years, the average annual profit is:
1. 28 lakh
2. 32 lakh
3. 35 lakh
4. 30 lakh
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Answer: (d) 30 lakh. Average = (20+30+25+45)/4 = 120/4 = 30 lakh.
In a pie chart of monthly budget, food is 30% and rent 20%. If total budget is Rs 40000, the amount MORE spent on food than rent is:
1. Rs 4000
2. Rs 8000
3. Rs 2000
4. Rs 6000
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Answer: (a) Rs 4000. Difference = 30%-20% = 10% of 40000 = 4000 Rs.
A company's expenditure increased from 250 to 300 units. The percentage increase is:
1. 15%
2. 50%
3. 20%
4. 25%
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Answer: (c) 20%. Increase = 300-250 = 50.
In a table, a student scored 80, 90, 70, 60, 100 in 5 subjects (each out of 100). Overall percentage:
1. 75%
2. 80%
3. 78%
4. 82%
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Answer: (b) 80%. Total = 80+90+70+60+100 = 400 out of 500.
If two sectors of a pie chart together make 40% and one is 3 times the other, the smaller angle is:
1. 40 degrees
2. 54 degrees
3. 36 degrees
4. 30 degrees
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Answer: (c) 36 degrees. Two parts sum 40%, ratio 1:3 → smaller = 10%, larger = 30%.
Production over 3 years: 400, 500, 600 tonnes. The percentage increase from first to last year is:
1. 60%
2. 25%
3. 50%
4. 40%
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Answer: (c) 50%. Increase = 600-400 = 200 on base 400.
In a pie chart, expenses A:B:C:D are in ratio 2:3:4:1. The angle for C is:
1. 144 degrees
2. 120 degrees
3. 90 degrees
4. 160 degrees
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Answer: (a) 144 degrees. Total parts = 2+3+4+1 = 10.

Table DI

Overview

Key points

Explanation

Step by step

Examples

Traps and advanced points

Quick revision

Practice MCQs

More topics in this chapter