# Simple & Compound Interest, and Population Growth Tricks and Formulas

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## Simple Interest

## Compound Interest

. Then,

When interest is compounded Annually,

Amount

When interest is compounded Half-yearly:

When interest is compounded Quarterly:

When interest is compounded Annually, but the time is in fraction, say years.

Then,

When Rates are different for different years, say

Then,

Present worth of Rs. x due

*n*years hence is given by: Present

## Population Formula

## Depreciation Formula

## Growth

[Here, S. A. G. R. = Simple Annual Growth Rate, A. A. G. R. = Average Annual Growth Rate and C. A. G. R. = Compound Annual Growth Rate]