All New SAT Math - Calculator Resources
Example Questions
Example Question #1 :Solving Systems Of Equations In Word Problems
Mark is three times as old as his son Brian. In ten years, Mark will beyears old. In how many years will Mark be twice as old as Brian?
Possible Answers:
Correct answer:
Explanation:
In ten years, Mark will beyears old, so Mark isyears old now, and Brian is one-third of this, oryears old.
Letbe the number of years in which Mark will be twice Brian's age. Then Brian will be, and Mark will be. Since Mark will be twice Brian's age, we can set up and solve the equation:
Mark will be twice Brian's age inyears.
Example Question #2 :Word Problems
Gary is twice as old as his niece Candy. How old will Candy will be in five years when Gary isyears old?
Possible Answers:
Not enough information is given to determine the answer.
Correct answer:
Explanation:
Since Gary will be 37 in five years, he isyears old now. He is twice as old as Cathy, so she is岁,在过去5年中,她会years old.
All New SAT Math - Calculator Resources
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