🏛️ Number & Proportion Misconceptions
Common mistakes in number & proportion
Adding numbers under the root sign H
"The Root Addition Error"
Number & ProportionAdding the percentage instead of multiplying
"The Add-On Error"
Number & ProportionConfusing HCF and LCM
"The HCF-LCM Swap"
Number & ProportionDividing by one ratio part instead of the total
"The Part-Total Mixup"
Number & ProportionHaving A greater than or equal to 10
"The Ten Trap"
Number & ProportionMoving the decimal point the wrong way
"The Backwards Shift"
Number & ProportionMultiplying indices instead of adding when multiplying powers
"The Power Multiplier"
Number & ProportionUsing simple interest formula for compound interest
"The Simple Mistake"
Number & ProportionUsing the wrong inequality sign for upper bound H
"The Inequality Slip"
Number & ProportionApplying index laws to different bases
"The Base Blunder"
Number & ProportionDividing by the new value instead of the original
"The Denominator Disaster"
Number & ProportionDividing numerator and denominator by different numbers
"The Unequal Split"
Number & ProportionGiving shares to the wrong people
"The Swap Error"
Number & ProportionNot fully simplifying a surd H
"The Partial Simplify"
Number & ProportionThinking 1 is a prime number
"The One Error"
Number & ProportionUsing 1 + r instead of 1 - r for depreciation
"The Depreciation Direction"
Number & ProportionUsing wrong bounds for subtraction H
"The Subtraction Swap"
Number & ProportionUsing wrong sign for small numbers
"The Sign Slip"
Number & ProportionFinding percentage of final amount for reverse problems
"The Backwards Blunder"
Number & ProportionForgetting to convert percentage to decimal
"The Percentage Slip"
Number & ProportionGetting the ratio the wrong way round
"The Flip"
Number & ProportionLeaving a surd in the denominator H
"The Forgotten Rationalise"
Number & ProportionNot adjusting after calculation
"The Unadjusted Answer"
Number & ProportionThinking negative index gives negative answer H
"The Negative Confusion"
Number & ProportionThinking percentage means out of 100 literally
"The Literal Hundred"
Number & ProportionTreating truncation the same as rounding H
"The Truncation Trap"
Number & ProportionWriting prime factorisation without index notation
"The Index Omission"
Number & ProportionAdding/subtracting wrong amount for bounds H
"The Half-Step Slip"
Number & ProportionFinding LCM by just multiplying the two numbers
"The Multiply Mistake"
Number & ProportionMultiplying base by fraction for fractional indices H
"The Fraction Fumble"
Number & ProportionSubtracting interest to find original amount
"The Reverse Mistake"
Number & Proportion