exam Maths Puzzle Numerical Ability

if an intrerior angle has a measure of 140 degrees what is the name of the polygon?

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exam Other Question

Find the value of the following:
7!12!
_____
10!11!

If your answer is not an integer, write it as an exact fraction. Please help me with this problem (solve the equation and show the steps). Thanks!!
14/(x^2-1)+1/(x-1)=3/x+1