by Dorothy Akphovwa
The following is a square array of 16 dots with 4 rows and 4 columns. The red dots are on the outside of the array. If you use 144 dots to form a square array:
- how many rows rows and columns are there?
- how many dots are on the outside of the array?
Lisa lives on the 9th floor of a building. There 36 stairs between two connecting ﬂoors. How many stairs does Lisa have to climb to reach the 9th floor, starting from the first floor?
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