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Basic Maths Tricks for NDA, AFCAT, CDS

There are some hidden tricks to save your precious time. Less than one month is left for CDSE, AFCAT exams. Some students requested us to provide Maths Tricks and Shortcut methods to “Crack AFCAT, CDSE, NDA exam”. So here are we providing you some basic Maths tricks below.

Basic Maths Tricks for NDA, AFCAT, CDS

Multiplication

Multiply 62×32 

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10 Fast Maths Tricks and Shortcuts Bank Exams Today

10 Fast Maths Tricks and Shortcuts Bank Exams Today 1

 

Multiplication by 99

What you have to do is multiply that number by 100 and subtract same num from it . For example 44

Multiply 44×99 = 4400 – 44 = 4356

Multiply by 5

Simply multiply the number by 10 and then divide it by 2.
For example 99×5= 990/2= 495

Square

For example – Find square of 43
= (43+3) × (43-3) + (3×3)
=(46×40) + 9
= (460×4) + 9
= 1840 + 9 = 1849

perfect-squares-chart11

Square Root

Find square √ 1936
√ 1936 = √ 4 × √ 484 = √ 4 × √ 4 × √ 121 = 2×2×11 = 44

Profit and Loss

In case of profit
25% of Cost Price (1/4 of CP) = 20% of Selling Price (1/5 of SP)
Similarly 1/3 of CP = 1/2 of SP

In case of loss
25% of Selling Price (1/4 of SP) = 20% of Cost Price (1/5 of CP)
Similarly 1/3 of SP = 1/2 of CP

Work & Time

Every question in in time and work chapter can be solved easily by finding efficiency of workers or subject (such as pipes).

For example – A takes 10 days to complete a job. B takes 20 days to complete the same job. In how many days they will complete the job if they work together ?

A’s efficiency = 100/10 = 10% per day
B’s efficiency = 100/20 = 5% per days

A and B can do 15% of the work in a day if they work together. So they can do the whole job in 100/15 = 6.66 days or 6 days and 18 hours.

We will update some tricks till that stay in touch with us!

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  1. Thanks for tricks

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