exam Maths Puzzle Numerical Ability

how many whole numbers between 100 and 400 contain the digit 2 in their standard notation????????

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exam Other Question

Hi, I was just wondering if I have the right answer for this equation. Thank you!

2x^2+7x+3 divided by 4x^2-1. The answer I have is (x+3) over (2x+1).
I have been having trouble on this problem for awhile now and I was wondering if anyone could help me? Please and Thank You!! I would deeply appreciate it!

Factor completely. check for a greatest common factor first.
X^8-1