If q is a member of the set { 21 , 22 , 24 , 25 , 26 , 27 } what is the value of q ?

Is x% of x% of y equal to x% less than y ?

If x, y, and z are three-digit positive integers and if x = y + z, is the hundreds digit of x equal to the sum of the hundreds digits of y and z ?

These are some that I cannot find despite the fact that I copied them from GMATClub.

I used advanced search, but that didn't help.

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