**Mnemonics** are devices to help us remember (**aide memoire** or **memory aide**). They come in many varieties and flavours, and can aid memorisation of many types of information.

Now It would be frustrating if you understood the concepts well, but in the exam, forgot your maths formula!

Well, Mnemonics have a well use for mathematics, where we need to remember various formulas and values.

Mnemonics are many a times funny or crazy lines why you wouldn’t forget quite easy.

**Some Mnemonics:**

The most common type of mnemonic is the **word-length mnemonic** in which the number of letters in each word corresponds to a digit.

**Value Of Pi**** ****(π)**** **

**Count the number of letters in each word:**

**Pi (π) to 7 decimal places:** (Word lengths are digits)

May I have a large container of coffee?

3.1415926

**Pi (π) to 10 decimal places:** (Word lengths are digits)

May I have a large container of coffee ready for today?

3.1415926535

**Area Of A Circle**** **

Apple pie are square: A = π × r^{2}

**Simple Interest Formula**

**Interest = principle × rate × time **

• I = prt

read as “I am **pr**e**t**ty ”

A sentence to help you spell isosceles

I sat on sunny cliff eating lovely egg sandwiches.