exam Maths Puzzle Numerical Ability

is 42 the right answer for this?

Find the GCF for 14 and 21?

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exam Other Question

Fax paper costs $17.00 per case and copier paper costs $11.00 per case. If an order is recieved for a total of 250 cases for $3,659.00 what is the excat number of cases of copier paper? A ball is thrown vertically upward from the ground with an initial speed of 80 ft/sec. Its height is given by h=80t-16t^2. How high does the ball go? When does the ball hit the ground?