Level 3
Susan had a collection of 1910 red, blue and yellow beads. After Susan gave away 350 red beads, the number of red beads was 240 fewer than the number of blue beads. Given that the number of yellow beads was twice as many as the number of blue beads, how many red beads did Susan have at first?
Level 3
Mark had thrice as much money as Paul. After Mark had spent $60, Paul had twice as much money as Mark. How much more money than Paul had Mark at first?
Level 3
Dennis had 120 marbles more than Jean at first. After Dennis had given away 150 of his marbles to Calvin, Jean had thrice as many marbles as Dennis. Find the number of marbles Dennis had at first.
