exam Maths Puzzle Numerical Ability

I need help with this quiston:

A number plus one is greater than negative five and less than three.

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exam Other Question

Among U.S. households, 24% have telephone answering machines. If a telemarketing campaign involves 2,500 households, find the probability that more than 650 have answering machines I hope this is the right topic! I am not sure where to start with this....

The volume of the box is represented by (x^2+5x+6)(x+5). Find the polynomial that represents the area of the bottom of the box.

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