exam Maths Puzzle Numerical Ability

Find all the integer values for b so that the trinomial can be factored.

3x^2+bx+2

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exam Other Question

Travelers have reset their watches only when the time change equals 1.0h. How far on the average must you travel in degrees of longitude until your watch must be reset by 8 hours? This is another one that has me stumped.

Please solve:

1+(a/b) / 1-(a^2/b^2)

Thanx for your help!