Profit and Loss
In case of profit
25% of Cost Price (1/4 of CP) = 20% of Selling Price (1/5 of SP)
Similarly 1/3 of CP = 1/2 of SP
In case of loss
25% of Selling Price (1/4 of SP) = 20% of Cost Price (1/5 of CP)
Similarly 1/3 of SP = 1/2 of CP
Estimation
That’s the most important technique. This is not a secret that every successful candidate is using this technique during exams.
Example – 112 × 92
Simply 112 × 9 = 1008
Add a zero 10080 and then add 224 to 10080.
Answer is 10304
You need to do all the calculations in your brain. Don’t use paper. You need to divide complex calculations in parts and solve it in your brain without paper. That’s how toppers do complex calculations during exams.
Right now it will be difficult for you to use this method but with practice, you will be able to do any complicated calculation within seconds.
