MBA aspirant stuff
GET stuff to prepare for exam :
- For mental calculations: secret of mental calculation
- Math's shortcuts :
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1. Tricks for numbers:
1.Any prime number greater than 3 is in form of 6k+1 or 6k-1.
2.Any factorial greater than 4 is end with 0.
For Example::
4 | 24 |
5 | 120 |
6 | 720 |
7 | 5040 |
8 | 40320 |
3.Product of any 4 consecutive Natural number is always divisible by 24.
for example:
1*2*3*4=24
7*8*9*10=5040.(which is divisible by 24)
4.Any perfect square having last two digits equal is only one no is possible that is:144
5 N is natural number when :
(N*N*N)/6 same reminder can be obtain by (N)/6
This trick will help you to solve many questions regarding reminder problems.
example:
find the reminder of :
6859/6
here 6859= (19)^3
which means our answer will be same reminder as (19)/6