DSSSB TGT & PGT Maths PYQ (Set 2): 150 Advanced Type-Wise Percentage Practice Test (2014–2025)
This is Set 2 containing 150 brand-new, unique questions focusing on the higher-difficulty percentage archetypes: Income & Savings, Elections, Mixture Dilutions, Sales Commission, and 3D Mensuration shifts with authentic DSSSB exam years and repetition frequency counts.
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Formulas & Shortcuts for Advanced DSSSB Percentage Models
In Set 2, questions focus on multi-tier arithmetic equations. Here are key rapid-fire shortcuts:
| Question Pattern | Standard Shortcut / Formula |
|---|---|
| Income & Savings | Income = Expenditure + Savings. If Income increases by x% and Expenditure by y%, use weighted averages: $\Delta S = \frac{I\Delta I - E\Delta E}{S}$. |
| Two-Candidate Election | Total Votes = $\frac{\text{Margin of Victory}}{\% \text{Winner} - \% \text{Loser}} \times 100$. Account for invalid votes beforehand. |
| Mixture & Dilution | Initial Quantity $\times$ Initial Concentration = Final Quantity $\times$ Final Concentration (when solvent is added/evaporated). |
| Cylinder / Cone Volume | $V \propto r^2 h$. Net % Change = $(1 + \Delta r)^2 \times (1 + \Delta h) - 1$. |
| Sphere Volume | $V \propto r^3$. Net % Change = $(1 + \Delta r)^3 - 1$. |
Frequently Asked Questions (DSSSB Advanced Percentage Set 2)
1. How often do election and mixture questions appear in DSSSB TGT CS?
Election and mixture-based questions are staples of DSSSB Paper 1 arithmetic, appearing in approximately 40% of all shifts between 2017 and 2024. They evaluate proportional calculation under multiple conditions.
2. How are 3D Mensuration questions related to Percentage?
DSSSB frequently asks questions such as: "If the radius of a cylinder is increased by 20% and height decreased by 10%, find the change in curved surface area and volume." While these are geometric shapes, the calculation relies entirely on successive percentages ($r \times r \times h$).
3. What is the marking scheme implemented in this test?
In accordance with official DSSSB guidelines, each correct question awards +1.0 mark and each incorrect answer deducts -0.25 marks. Unattempted questions carry zero penalties.
4. Can I complete 150 questions in 20 minutes?
The 20-minute countdown is a speed-drill mechanism designed to replicate intense examination conditions. It pushes candidates to use fractional shortcuts rather than conventional algebraic methods, building crucial time-management skills for DSSSB TGT Computer Science.
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