DSSSB TGT & PGT Maths PYQ (Set 3): 150 High-Yield Percentage Practice Test (2014–2025)
This is Set 3 containing 150 completely non-repeated, unique questions covering high-frequency DSSSB patterns: Error Miscalculations, Chain Variable Proportions, Residual Remainder Balances, 3-Subject Venn Models, and Free-Item Bundling with real exam occurrences and frequency data.
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Speed Formulas & Shortcuts for Set 3 Archetypes
These formulas are specifically targeted toward high-yield DSSSB arithmetic patterns:
| Question Pattern | Standard Shortcut / Formula |
|---|---|
| Multiplication Error ($a/b$ instead of $c/d$) | $\text{Error \%} = \frac{\vert{}\text{Correct Value} - \text{Wrong Value}\vert{}}{\text{Correct Value}} \times 100$. Choose LCM of $b$ and $d$ as the assumed number. |
| Residual Remainder Spending | $\text{Final Balance} = \text{Total} \times (1 - \frac{r_1}{100}) \times (1 - \frac{r_2}{100}) \times (1 - \frac{r_3}{100})$. |
| Buy $X$, Get $Y$ Free Discount | $\text{Discount \%} = \frac{\text{Free Items}}{\text{Total Items Received}} \times 100 = \frac{Y}{X + Y} \times 100$. |
| Price Drop & Quantity Increase | $\text{Original Price per kg} = \frac{\text{Total Expenditure} \times r}{(100 - r) \times \text{Extra Quantity (kg)}}$. |
Frequently Asked Questions (DSSSB Advanced Percentage Set 3)
1. Where can I find Set 1 and Set 2 of this Percentage PYQ series?
You can access both sets directly through these links:
• Set 1 Mock Test (Questions 1–150)
• Set 2 Mock Test (Questions 151–300)
2. How do you solve fractional miscalculation questions in under 10 seconds?
Always assume the arbitrary number is the Lowest Common Multiple (LCM) of the denominators of both fractions. For instance, if multiplying by 3/5 instead of 5/3, choose 15 as your number. Correct is 25, erroneous is 9; error is 16/25 = 64%.
3. What is the difference between total expenditure and remaining expenditure?
If an individual spends 20% on rent and 30% of the remaining on food, the food expenditure is not 30% of the base salary, but 30% of 80% (i.e., 24%). Always look for the word "remainder" or "of the rest".
4. How does the "Buy X Get Y Free" promotional offer convert into a percentage?
Candidates often mistakenly divide by X. The true formula is $Y / (X + Y) \times 100$, because the consumer walks away with $(X + Y)$ total goods for the cost price of $X$.
5. Why is practicing 450 total PYQ questions necessary for DSSSB?
DSSSB rotates through 15 distinct arithmetic models with numeric adjustments across shifts. Completing all three 150-question sets ensures complete coverage of every possible variation tested in Paper 1.
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