Amitava, it is fantastic that you are contributing problems, but you really need to spend more time specifying what the solution should do. The person solving is left needing to guess too much.
Definitely Agree with the cyclist. W/o example it is impossible to understand the task to achieve.
The DC component of a signal is usually its mean. Now filter can have many meanings, but in this case, it means to remove the signal variation.
Least common multiple of many numbers
Is A the inverse of B?
Multiply 2 numbers
Given a matrix, swap the 2nd & 3rd columns
Create incrementing array
area of an annulus
Simple spirometer - find your lung capacity from the number and size of soap bubbles in one breath
Given n, create n random numbers such that their standard deviation is also n.
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