exam Maths Puzzle Numerical Ability

Find three consecutive numbers whose sum is 126? Could you show the steps for me.

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exam Other Question

I am having a very hard time trying to figure this out. Can you please help me?
I am sorry, I forgot to put in there what it is I need to do with the problem.

Find the axis of symmetry.

y = x squared - 5x + 3 4:(x-6)=2:6
x=?