Mathematics is a complex subject
and many of the students panic when it comes to numbers. Entering to class 11th,
students are served with choice to study mathematics or not. Unfortunately, in
Government exams, mathematics is a compulsory section. Thus, many candidates
panic over the subject and make their government examination preparation suffer
because of all the mental pressure. Ekagra Academy experts state “mathematics
is a subject where short techniques are the main weapons.” Similarly, following
are five common maths tricks to score better in government examination. Ekagra Academy provides coaching for ssc in Delhi. Take a
glimpse—
Squaring
of complex numbers
Government exams do not allow
calculators, hence, squaring is consider as a time-consuming activity. However,
it cannot be avoided while solving questions. Here’s a simple trick to easily
find square of any number (irrespective of digits). Here is how: add the last
digit one time multiply it to the subtraction of last digit from main digit and
add square of last digit. Practical: assume we are demanded to find.
=(129)^2 = (129+9) * (129-9) +
(9*9)
=138*120+81
=16641
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Multiplication
with number 99
It is very common trick, however
quite useful. Assume if you are given: 43*99. Simply multiply 43*100 and less
43 from the resulted number. See practical:
(43*100)-43 = 4300-43= 4257.
Easy
Compound Interest calculation
Formula of compound interest is
equals to Rate^n% multiply by the principal, where n is number of years/time.
Hence, learn a simply formula for R^2= 2r|r^2. Similarly, for R^3% use
3r|3r^2|r^3.
Further add two digits, i.e., on
the left and the right of “|” and put a decimal in place of “|”. For instance,
R^2 = 28|196 = 29.96. Simply multiply the resulted digit to the principal
amount.
Complex
multiplication
Assume we need to find (130*22).
Calculate like this: Simplify it as (130*2) = 260, add another zero to resulted
digit: 2600. Now add the double of first digit (130) to it. 2600 + 260 = 2860.
If it was (130*23), we would have added the triple of 130 to 2600.
Note: students must practice
these tricks enough that they are not required to use paper. Indeed, writing
down these tricks and then solving only makes the question more complex and
make time management to suffer.
For government examination
professional coaching, visit http://ekagraacademy.com/ and learn from the best
mathematics professors with years of experience in the education industry.
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