bazc wrote:
Another tip,
If B is 1/x times more than A, then A is 1/(x+1) times lesser than B.
This is especially useful in averages, profit and loss, time rate questions.
Example:
If B's wage is 25% more than A's wage, then what is A's wage in terms of B?
B is 1/4 times more than A, so A will be 1/5 or 20% lesser than B. i.e., A = 80% of B
On test day people (including myself) might scramble and forget formulas. Would a solution like so work just as well?
B = (5/4)A --> A = (4/5)B
bazc wrote:
Tip for questions involving recurring decimals:
Note the following pattern for repeating decimals:
0.22222222... = 2/9
0.54545454... = 54/99
0.298298298... = 298/999
Note the pattern if zeroes preceed the repeating decimal:
0.022222222... = 2/90
0.00054545454... = 54/99000
0.00298298298... = 298/99900
Are there other such patterns for repeating decimals for divisibility involving non 9? What about example questions where this might become relevant?
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