Some Math / Number Theory Tricks
1# Using Logarithms to Find Number of Digits in Large Numbers 2# A number N can be represented by the difference of the square of two numbers that means it is possible to find two integers p and q such that N = p^2 - q^2 If N is Odd or N is divisible by 4. If we named this type of number is a good number then 2.1# If two number A and B both are good number then the product of them are also must be a good number 3# If a array / sequence have N element then total number of subarray / contigious_subsequence is n(n+1)/2 <<<<<<<<<<<<<<<<<<<<<<<<<<<<**************>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>