Do rounding towards minus infinity.
Example: -8.8, answer -9
+8.1 answer 8
+8.50 answer 8
Omit columns averages from a matrix
Arrange Vector in descending order
Returning a "greater than" vector
Extra safe primes
Check that number is whole number
calculate interest saved because of reduction of interest rate
Convert given decimal number to binary number.
Find out sum of all elements of given Matrix
Find out Harmonic mean.
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