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

I dont understand how to divide inequalities. especially the following problem that has a lot of fractions

7/5(10m-1)<2/3(6m+5)
I need a little help with the following:

How many 2-inch square blocks can fit inside a rectaingle that is 10in. high by 20in long?