exam Maths Puzzle Numerical Ability

Several values of the two functions f and g are given in the following
tables:

x 4 5 6 7 x 4 5 6 7
f(x) 6 7 4 5 g(x) 6 5 7 4

Find ( f o g)(7) .
a. 4
b. 5
c. 6
d. 7

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exam Other Question
surface area of withradius 15 and slant hieght 10 two positive numbers are consecutive odd integers. the square of the smaller is 10 less than 5 times the larger. Find the integers.