Formula Bank
Revise math, physics and chemistry formulas with use cases and exam examples.
Mathematics • Percentages
Percentage change = (change / original value) × 100
Use when a value increases or decreases compared with its original value.
Example: If 80 becomes 100, change = 20, so percentage change = 20/80 × 100 = 25%.
Connected tests: FAST NUCES, NUST NET, NAT, GAT General, SAT
Mathematics • Ratios and Proportions
One part = total / sum of ratio parts
Use when a total quantity is divided according to a ratio.
Example: For 2:3 and total 50, one part = 50/5 = 10; shares are 20 and 30.
Connected tests: FAST NUCES, NUST NET, NAT, GAT General
Mathematics • Averages
Average = sum of values / number of values
Use for mean score, combined values and data interpretation.
Example: Average of 10, 20 and 30 is 60/3 = 20.
Connected tests: NAT, GAT General, GRE, GMAT
Physics • Kinematics
Speed = distance / time
Use when distance and time are given and motion is uniform.
Example: 60 meters in 5 seconds gives speed = 60/5 = 12 m/s.
Connected tests: MDCAT, ECAT, NUST NET, GIKI
Physics • Electricity
V = IR
Use for voltage, current and resistance problems in simple circuits.
Example: If I = 2 A and R = 5 Ω, then V = 10 V.
Connected tests: MDCAT, ECAT, NUST NET, PIEAS
Physics • Kinematics
Density = mass / volume
Use for basic physical property questions.
Example: Mass 100 g and volume 20 cm³ gives density = 5 g/cm³.
Connected tests: MDCAT, ECAT, NUST NET
Chemistry • Atomic Structure
Moles = mass / molar mass
Use in basic stoichiometry and chemistry numericals.
Example: 18 g water with molar mass 18 g/mol gives 1 mole.
Connected tests: MDCAT, ECAT, NUST NET, PIEAS
Mathematics • Algebra Basics
Probability = favorable outcomes / total outcomes
Use for simple chance and selection problems.
Example: One head in a coin toss has probability 1/2.
Connected tests: FAST NUCES, NAT, GAT General, GRE, GMAT
