Aptitude- Math Word Problems

In a box of marbles, the ratio of red marbles to total marbles is 2:5. The ratio of green marbles to total marbles is 3:10. If the marbles that are neither red nor green are blue, how many blue marbles are in the box if there are 40 marbles in the box?

There is $6,345.27 in a checking account. If $2,894.70 is withdrawn from the account to pay bills, how much money remains in the checking account?

A school play's production costs are $20 per costume and $35 per set. How much money will it cost to produce a school play that requires 13 costumes and 7 sets?

A new TV, worth $500, loses $75 in value every year. If T represents the number of years since the purchase of the new TV, which of the following expressions represents the value of the TV at time T?

Juliana is not certain which pizza to order. She can have the medium or large size pizza, with thin or thick dough; replace the regular with hot or garlic sauce; add one topping if she'd like: mushrooms, onions, peppers or pepperoni.

How many different pizzas can Juliana eventually order?

100g of almonds contain 255mg of calcium and 4.5mg of zinc. Charles eats 40 g of almonds on a daily basis due to health considerations.
How many mg of calcium and zinc does Charles eat daily?

A small company manufactured 80 machines the past years. A quarter of the machines have minor defects in them. Another fifth of the machines have major defects. How many machines are free of defects?

Half the kids in kindergarten like squash. 0.4 like eggplant. One quarter like both. If there are twenty children in all, how many of them do not like eggplant or squash?

Prof. Evans runs a chemistry laboratory. At the beginning of each year he recruits two new students and fires a former one. Every student conducts 3 experiments per year. If at the middle of 2010 he had 2 students, how many experiments would he conduct in 2013?

Every house in New-Yard city costs five times an equivalent house in Yard city. Linda bought five houses in New-Yard and 2 houses in Yard.
Which of the following could she have bought instead for the same price?