exam Maths Puzzle Numerical Ability

Willis scores an average of 7 foul shots out of every 10 attempts. At the same rate how many shots would he score in 200 attempts?

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exam Other Question

The diameter of circle AOB is 12, Triangle ABC is inscribed in the circle, angle A = 45. In cm squared what is the area of Triangle ABC,
a) 18
b) 108
c) 144
d) 36
or e) 72 Can someone help me on this problem?

I need to find the constant of variation k

m varies directly with n; m = 144 when n = 8

Thanks,
Ashley