Level 2
Abigail has twice the number of hair clips as Betty. Clare has thrice the number of hair clips as Abigail. If Clare has 504 hair clips, how many hair clips do the three girls have altogether?
Level 3
The length of a plank is 3 m 2 cm long. Annie cut the plank into 3 pieces. The length of the first piece of the plank is 50 cm. The length of the second piece of the plank is 1 m shorter than the third piece. What is the length of the third piece of plank?