exam Maths Puzzle Numerical Ability

1.All squares are rectangles.
2. If a quadrilateral is a ractangle, then it has congruent diagonals.

I do not understand how to come to a conclusion on the question.
it says t

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exam Other Question

Hello out there,I need some help with a couple of problems,the first one is,Name the set or sets of numbers to which the given real number belongs:0.1,is it real,rational or real,r What is the y intercept for this equation:y=x^2+2x-1?

so far:1=x^2+2x
1=x(x+2)