# TRICKY MATH

HERE WE ARE NOT DOING MATH BUT MAKING SOME TRICKY TECHNIQUES THAT ARE VERY IMPORTANT WHEN WE HAVE TO DO A LOT OF MATHEMATICS WITHIN VERY CONSTRAIN TIME. SO TRY TO REMEMBER AND ENJOY THE TRICKS.......

# There are 25 prime numbers from 1-100. If you can remember the sequence like following technique then you can speedy calculate prime numbers from any range like 31-70, 36-83, etc.

1-10=4
11-20=4
21-30=2
31-40=2

41-50=3
51-60=2
61-70=2

71-80=3
81-90=2
91-100=1

Shortcut:

1- 4422,
2- 322,
3- 321.

# According to math text book of class six of Bangladesh,

The factors of 6 is : 1,2,3 and 6.

The multiple of 6 is :  6,12,18,24.......

On the other hand according to Barron's GRE book,

The factors of 6 is : 1,2,3 and 6. Again,

-1,-2,-3,-6.

The multiple of 6 is :  6,12,18,24.......

Again,

-6,-12,-18,-24.....

And 0(zero) also.

# Always remember that 1 is not a prime number.

# Always remember that 0 is also a integer but it is neither positive nor negative.

# Want to remember the sequence of Roman numbers?

I =1
V =5
X =10

Everybody knows these three numbers. Now,

L =50
C =100 (Century)
D = 500
M =1000 (Millennium)

The technique to remember the sequence is LCD Monitor.   Ok.

#  If you can remember the root over of 2= 1.41 and root over of 3= 1.73 then  you can speedy calculate any math which have root over of 2 or root over of 3.

# If  4th  December of  2008 is Monday then 4th  December of 2009 is what ?

- Technique: 365/7 = 52 weeks and 1 day so the answer is Tuesday.

In the case of leap year the answer will Wednesday.   ( Leap year will calculate if the stipulated range of time contain Leap year February).

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