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# TNPSC Maths Shortcuts in Tamil – Preparation with Best Short Tricks & Tips

## TNPSC Maths Shortcuts in Tamil

Going to appear in TNPSC Exam? Check TNPSC Maths Shortcuts Tricks & Tips from here and start your preparation in systematic way. The following best TNPSC Maths Shortcuts in Tamil will helpful for you to solve maths question easily.

Now, here we’re summarizing all the maths Short Tricks & Tips that will speed up your calculation speed. And, we sure that these TNPSC Group 4 Maths Shortcuts will help you increase your score. Open the respective links to download TNPSC Maths Shortcuts Pdf.

### TNPSC Maths Shortcuts in Tamil

Those, who want to score highest marks in Maths Section, they must learn below provided Best Short Tricks & Tips. For more information about TNPSC Maths Shortcuts, you need to scroll down this page of www.recruitmentinboxx.com. Must have a glance…

TNPSC Group 2 Maths Shortcuts for LCM & HCF

To find out Highest Common Factor and Least common multiple, you have to use below provided shortcut tips. It is the most inserting concept in maths so prepare well by memorizing listed tricks.

• Product of two numbers = Their HCF * Their LCM
• HCF of given numbers always divides their LCM
• HCF of given fractions = HCF of numerator/ LCM of denominator
• LCM of given fractions = LCM of numerator / HCF of denominator
• If d is the HCF of two positive integer a and b, then there exist unique integer m and n, such that d = am + bn
• HCF of a given number always divides its LCM

For Example:

Ques: Least number which when divided by 35,45,55 and leaves remainder 18,28,38; is?

Solution:

• In this case we will evaluate l.c.m and here the difference between every divisor and remainder is same i.e. 17.
• Therefore, required number = LCM of (35,45,55)-17 = (3465-17)= 3448.

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TNPSC கணித குறுக்குவழிகள் For Percentage

It is an important chapter in maths and this type of problem are often comes in Quantitative Aptitude which is a very essential paper of competitive exam. Check below listed tips and tricks to solve Percentage questions.

• Express p/q as a percentage: (p/qx100)%
• If the price of a commodity increases by R%, then the reduction in consumption as not to increase the expenditure is [R / (100 + R) x 100]%
• If the price of a commodity increases by R%, then the reduction in consumption as not to increase the expenditure is [R / (100 + R) x 100]%
• Population after n years = P(1 + R / 100)n
• Population n years ago = P / (1 + R / 100)n
• If A is R% more than B, then B is less than A by [R / (100 + R) x 100]%
• If A is R% less than B, then B is more than A by [R / (100 – R) x 100]%

For Example:

Ques: How to express x/y as a percentage

Solution:

We know that x/y  = (x/y× 100 )

Thus 1/4 = ( 1/4 ×100 )% = 25%

and 0.8 = ( 8/10 ×100 )% = 80%

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TNPSC Maths Shortcuts In English For Surface Area and Volume

In order to solve questions related to Surface Area and Volume, you can use below listed tricks and tips. You also memorize the Formula for volume & surface area. So, go through this tricks:

• 1 litre=1000cm3
• Sum of all angles of a triangle is 1800
• Pythagoras Theorem= (Hypotenuse)2 = (Base)2+(Perpendicular)2.
• The sum of two sides of a triangle is greater than the third side.

For Example:

Ques: Find the volume of a cube whose perimeter of each face is 20 feet.

Solution:

The perimeter of one face of a cube = 20 feet

The face of a cube has 4 edges.

The length of an edge of the cube = 20/4 = 5 feet.

The volume of the cube having A as an edge is A3 unit3.

Then volume = 53 = 125 feet3.

Also Check: Best Books for TNPSC Exam Preparation

TNPSC Group 4 Maths Shortcuts In Tamil For Simple Interest

The term Simple Interest (SI) is an interest which is calculated as a percentage of the borrowed money and its Principal Amount is constant. Check here the shortcut tricks to calculate Simple Interest.

• SI = P x R x T/100
• Principal = Simple Interest ×100/ R × T
• Rate of Interest = Simple Interest ×100 / P × T
• Time = Simple Interest ×100 / P × R
• If rate of Simple interest differs from year to year, thenSimple Interest = Principal × (R1+R2+ R3…..)/100

For Example:

Ques: A sum of Rs 7700 is lent out in two parts in such a way that the interest on one part at 20% for 5 yr is equal to that on another part at 9% for 6 yr. Find the two sums.

Solution:

Here, R1 = 20% R2 = 9%

T1 = 5 yr T2 = 6 yr

By using formula, ratio of two sums  = 1/100 : 1/54 = 27 : 50

Therefore, first part = [27/(27+50)]*7700 = Rs 2700

Second part = [50/(27+50)]*7700 = Rs 5000

TNPSC Maths Shortcuts For Time and Work

It is also an important topic for the aptitude exams. The questions related to Time and work have been appearing repeatedly over the past years in most of the competitive exams like SSC, Banks Exam, UPSC, Railway and other. So check from here the tips and tricks to solve Time and work Problems:

One simple tricks is using days in denominator while solving questions. For example, A can do a job in 3 days and B can do the same job in 6 days. In how much time they can do the job together.

Solution – 1/3 + 1/6 = 1/2, hence 2 days is the answer.

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Final Words:

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