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Math Word Problems - GED, PSAT, SAT, ACT, GRE Preparation
Direct Variation or Direct Proportion

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Q 1: The numbers x and y are directly proportional and x=9 when y=3. Find x when y=8; and find y when x=42.
25 and 15 respectively
14 and 24 respectively
24 and 14 respectively

 Q 2: The numbers p and q are directly proportional and p=7.5 when q=15. Find p when q=38; and find q when p=13.
19 and 26 respectively
15 and 29 respectively
26 and 19 respectively

Q 3: The numbers r and s vary directly and the constant of variation is 3/5. Find r if s=45; and find s if r =33.
55 and 27 respectively
27 and 55 respectively
50 and 25 respectively

 Q 4: A motor bike travels 225 km with 5 liters of gas. How many liters of gas are needed to travel 135 km?
3 liters
4 liters
3.5 liters

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