Age Problem

1) The sum of Jean’s and Marius’ age is 30. Jean’s age 4 years from now is double Marius’s age last year. How old is Marius now?
a. 6
b. 8
c. 10
d. 12

2) Brandon’s age is thrice Edward’s age. Peter’s age is half Brandon’s age. If Peter is 7 years older than Edward, how old is Brandon?
a. 24
b. 32
c. 42
d. 60

3) The product of Dave and Daniel’s age is 96. Three years from now, the product of their ages will be 165. What are their ages?
a. 4 and 24
b. 2 and 48
c. 3 and 32
d. 8 and 12

4) Lawrence has a daughter, Janet. Five years ago, he was 4 times as old as Janet. Two years from now, he will be three times as old as Janet. How old is Lawrence now?
a. 21
b. 45
c. 56
d. 61