exam Maths Puzzle Numerical Ability

Kim weighs 72 kg and eddie weighs 60 kg . Kime is sitting 2 m from fulcrum of a seesaw . How far from kim should eddie sit to balance the seesaw?

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exam Other Question

please find the distance between (-2,3,1) and (4,5,-1)

and

the midpoint of the points (-2,3,1) and (4,5,-1)

Thanks!
Given f(x)=1/3x+1
a. the domain
b. f(1)
c. f(1)-f(2)
d. f(1)-f(2)/3