exam Maths Puzzle Numerical Ability

Can you find three consecutive odd numbers that are prime number?

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exam Other Question

This problem stumped me, because my calculator cannot put in the fraction -3/5 * 2, i know its probaly really easy, but I still dont really know. Use the quadratic formula to find the solutions to the quadratic equation below

3x^2 - x - 2 = 0

A. - 2/3
B. -1
C. 2/3
D. -4/5
E. 1
F. 5/4