Blogger Tips And Tricks

You might have heard about time taken to double your invested money in X no. of years when agents are marketing about their product instead of straight away telling about effective rate of interest. So i am sharing you a trick to calculate rate of interest to double the amount if you know the time or vice versa in a matter of 3 seconds. Scope of formula : applicable to compound interest gives you a rough idea may or may not be accurate Applicable to double the amount Formula (Time taken to double Invested money) X (Rate of interest) = 72 Formula Check rate of interest be 10 % annualy, Investment amount Rs. 100000 using formula Time = 72 / Rate of interest = 72/10 = 7.2 years Amount = p  [(1+R%)^t] =100000 [(1+10/100)^7.2] =100000[(1.1)^7.2] =198621.99 Formula Pass :) If like the trick say Thanks 

Net Discount after series of discounts Net Discount= (1- 1st discount%) X (1-2nd disscount %) and so on E.g. Discount on shirt 10% on 30% Net discount = (1-0.1)(1-0.3)=(0.9*0.7)=0.63 or say 63 % net discount Lets check this formula on shirt mrp 100 Rs. After First Discount =100-100*(10/100) =100-10 =90 After Second Discount =90-90*30/100 =90-27 =63 Percentage Change = Price After Discount / Original Price *100 =63/100*100 =63%