Toby and Marcus both collect stamps. Toby has 10 stamps and collects 4 new stamps every week. Marcus has 60 stamps and collects 2 new stamps every week. After how many weeks will Toby and Marcus have the same number?

25 weeks will Toby and Marcus have the same number of stamps

Explanation:

No of stamps collected by Toby initially = 10

No of stamps Toby collects every week = 4

No of stamps Marcus has initially = 60

No of stamps Marcus collects each week=2

Suppose the no of week when Toby and Marcus have the same number of stamps are x

Hence no of stamps collected by Toby after x weeks

=10+4x

No of stamps collected by Marcus after x weeks

=60+2x

Therefore to calculate the same of stamps collected by Toby and Marcus

No of stamps collected by Toby after x weeks = No of stamps collected by Marcus after x weeks

10+4x = 60 + 2x

4x-2x = 60-10

2x=50

x=25

Hence after 25 weeks Toby and Marcus will have the same number of stamps