exam Maths Puzzle Numerical Ability

Find the probability of rolling a prime number when a die is rolled.

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exam Other Question

Solve the inequalty. Graph the solution on a number line. 3x+5<2x-1 find the solution set for each equation,given the replacement set.
y=2-5x;(3,12),(-3,17),(2,-8),(-1,7)

please give me some examples