exam Maths Puzzle Numerical Ability

Two cars are on a race track. It takes car "A" 1.5 minutes to drive a lap. It takes car "B" 2 minutes to drive a lap. How many minutes does it take for car A to pass car B?

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exam Other Question

Use properties of logarithms to expand the logarithmic expression as much as possible.
log2 (16 ^/�(x-1) )

a. 4 -1/2log2(x - 1)

b. log216-log2 ^/�(x - 1)
c what can a and k be so both points are on the graph of function?
points are (1,11) and (2,-19); function is y= a(x+1)^2 + k
how can i find the function so that both poitns are on the graph??