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.
So many choices
Project Euler: Problem 7, Nth prime
peta to nano (x-ray)
Convert a numerical matrix into a cell array of strings
Magic is simple (for beginners)
surface of a spherical planet
Person of interest?
radius of a spherical planet
Minimum possible M of the maximum side of a triangle of given area A.
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