exam Maths Puzzle Numerical Ability

Use the arithmic sequence of numbers 2,4,6,8,10.....to find the following:
a) What is d, the difference between any two consecutive terms
answer:
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b)

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exam Other Question

For 1985 through 1996,the number,C(in thousands),of videos rented each year Moose Jaw can be modeled by C=0.09(t^3+5t^2+31t+500),where t=0 represents 1990.During which year are 97. The amount of a radioactive tracer remaining after t days is given
by A = A0 e-0.058t, where A0 is the starting amount at the beginning of
the time period. How many days will it take for one half of the
original amount to decay?