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).