Mathematics Short Cut Tricks for IIT JEE
Here are some helpful short cut tricks for Mathematics that can be particularly useful for IIT JEE preparation:

Squaring Numbers
- To square a number that ends in 5, multiply the tens digit by itself plus 1, then append 25 to the result. For example, to square 35, calculate (3 x 4 = 12) and append 25 to get 1225.
- To square any number ending in 1, 9, 2, or 8, use the general formula (a + b)^2 = a^2 + 2ab + b^2. For example, to square 42, calculate (40 + 2)^2 = 40^2 + 2 x 40 x 2 + 2^2 = 1600 + 160 + 4 = 1764.

Divisibility Rules
- To check if a number is divisible by 2, it must end in an even digit.
- A number is divisible by 3 if the sum of its digits is divisible by 3.
- For divisibility by 4, check if the last two digits form a number divisible by 4.
- To check divisibility by 5, the number must end in 0 or 5.

Percentage Calculations
- To find 1% of a number, simply move the decimal point two places to the left.
- To find 10% of a number, move the decimal point one place to the left.
- To find 5% of a number, first find 10% and then divide by 2.
These are just a few examples of the many short cut tricks that can help you save time and improve your speed in solving mathematical problems for the IIT JEE exam. Practice these tricks regularly to become more efficient in your calculations.

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