exam Maths Puzzle Numerical Ability

Two cars are traveling toward each other and are 455 miles apart. One car is going 10mph faster than the other. They meet after 3.5 hours. How fast is each car going?

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exam Other Question

Which problem solve the equation below?
15x=120
F) chang collected 120 foreign postage stamps last year.He gave 15%of them to friends.what is x,the number of stamps Ch
Martha and Sally had lunch together on Tuesday. Sally paid $2 more than Martha. If the total bill was $5.64. How much did Sally pay for her lunch?

I need the answer :)