exam Maths Puzzle Numerical Ability

hi,
I was wondering if you need to prove the small triangles congruent and to make RW congruent to RZ is thr reason multiplication or division?
Thanks

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exam Other Question

HI
please help me with this

IS it possible to draw a quadrilateral so that all sides have positive slopes.If so do it if not explain why not. Say that a town has 1,000 residents,of whom 60% are women and 40% are men.Of the women,40% wear one earring.Half of the rest wear 2 earrings,and half wear none.Of the men,60% wear