answer is 10...i used guess and check ...!
We also got ten, but we trying to explain it to a 9 year old for her schoolwork. That is where we are stuck.
Math is the study of patterns.
My first column is the sum of cans after so many rows,
the second column in the increase in the number of cans
Think of racking up billiard balls
....О О О
...О О О О
..О О О О О
.О О О О О О
О О О О О О О
О О О О О О О О
etc, do you see the pattern?
the answer i got was 7 tennis balls
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