Level 3
Sean bought 3 boxes of red marbles and 3 packets of blue marbles. There were 24 red marbles more than blue marbles. He had 60 marbles altogether. How many red marbles were there in each box?
Level 3
The length of a rope is 25 m longer than a string. The length of a wire is 13 m shorter than the rope. The total length of the rope, the wire and the string is 58 m. What is the length of the rope?
Level 3
The total mass of Tom, Kelsey and Linda is 120 kg. Kelsey's mass is 6 kg more than Tom's and 18 kg more than Linda's. Find the total mass of Tom and Linda.
