Math Calculation for magical methods Tricks
Hello
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se related kuchh yaise tricks ke bare
me jo SSC CGL, CHSL, Bank PO etc. exam me aapkeliye helpful hoga.
Calculation
for magical methods Tricks
Trick1
:
How to find square of a number ending with 5?
Kisi bhi number ke end me 5 ho jaise 25 , 35 , 45, 55,
65, 105, 225 etc.
Esme se ham 45 ko lete hai
Multiply 5 by 5 = 25 as your right part of the answer.
Multiply 4 by the next digit 5 (4*5)= 20
Your answer is 2025
Ab ham 115*115 lete hai
5*5=25
11*12=132
Answer is 13225
Es prakar ap es trick se square nikal sakte hai jiske end
mai 5 ho.
Trick2
:
ab ham bat karte hai kisi number ka squar kaise nikalte hai
Rule- (10a + b)2 = 100a2
+ 10(2ab) + b2
Step1- 1. Square the one’s digit. Write this number down, carry if
necessary.
2.
Multiply the one’s digit with the ten’s digit and multiply by 2. Write this
number
down, carry if necessary.
3.
Square the ten’s digit. Write this number down.
Ex.1-
322 =
a)
22 =4. Write 4
b)
2 X 3=6. 6 x 2=12 write 2, carry *1
c)
32 =9 + *1= 10 write 10.
d)
The answer is 1024.
Ex2- 782 =
a)
8 2 =64 write 4, carry
*6.
b)
7 x 8= 56. 56 x 2 = 112 + *6 = 118. Write 8,
carry *11.
c)
72 = 49 +*11 = 60 write
60.
d)
The answer is 6084.
Yah method 3 digit numbers ko bhee adapt
karta hai.
Ex. 1232 =
a)
Think of 123 as (12)3 where 12 is
the number in the ten’s digit.
b)
32 =9 write 9.
c)
12 X 3 = 36. 36 X 2= 72. Write 2,
xarry *7.
d)
122 = 144 +*7 = 151.
Write 151.
e)
The answer is 15129.
Trick 3:
Squaring A 2-Digit Number:
Ab ham apko bataye ki 2 digit number ke squar kaise
nikalte hai:
Ex [1] 322 =_________.
a) 22 = 4. Write 4.
b) 2 x 3 = 6. 6 x 2 = 12. Write 2, carry *1.
c) 32 = 9 + *1 = 10. Write 10.
d) The answer is 1024.
Ex [2] 782 =_________.
a) 82 = 64. Write 4, carry *6.
b) 7 x 8 = 56. 56 x 2 = 112 + *6 = 118. Write 8, carry
*11.
c) 72 = 49 + *11 = 60. Write 60.
d) The answer is 6084.
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