NOTES FOR YOUR NEXT STUDY SESSION
Useful routines, worked examples and small ideas that make learning feel more manageable.
CHOOSE YOUR NEXT GUIDE
Choose the method that matches your question, then work through the examples.
सवाल में गलत मान है, दो ग्रुप हैं या कोई संख्या जोड़नी है? सही तरीका यहाँ चुनो।
Find an original value after a percentage increase or decrease. Learn the reverse-percentage formula with worked examples and checked practice answers.
Read article : How to Find the Original Number Before a Percentage IncreaseFind a missing frequency using mean = Σfx/Σf. Follow a worked table, solve the equation and check whether the frequency is a valid whole number.
Read article : How to Find the Missing Frequency When the Mean Is GivenLearn why multiplying or dividing an inequality by a negative reverses its sign, with number-line reasoning, worked solutions and substitution checks.
Read article : Why Does an Inequality Sign Flip When You Divide by a Negative?Understand why adding equal amounts usually changes a ratio. Solve ratio-change word problems using a common multiplier and verify both conditions.
Read article : Why Adding the Same Number to a Ratio Changes ItUse four simple checks—question, formula, arithmetic and units—to review an AI-generated maths explanation before submitting homework.
Read article : How to Check an AI Maths Answer Before You Submit HomeworkLearn the corrected-mean formula and solve a common statistics error question without recomputing every observation.
Read article : Corrected Mean Formula: Wrong Observation Solved ExamplesUse V = IR and P = VI to solve school electricity questions, convert time to seconds and avoid common circuit-unit errors.
Read article : Ohm’s Law Numericals: Current, Voltage, Power and EnergySolve specific heat capacity questions with Q = mcΔT, correct units and a worked calculation for school science.
Read article : Heat and Temperature: Specific Heat Numericals with a Simple MethodLearn how density comparison explains floating and sinking, with water examples, apparent weight and two short practice questions.
Read article : Why Objects Float or Sink: Density Questions Made EasyConvert common speed, density and pressure units safely using dimensional checks and worked Class 8–10 science examples.
Read article : Speed, Density and Pressure Unit Conversions: A Student Checklist