Question
Warren folded 11 paper aeroplanes on the first day. Each day he did 10 more paper aeroplanes than the previous day. On the last day, he made 141 aeroplanes. How many days did he fold paper aeroplanes?
2 m

Click button first when a symbol is required. X

Warren folded 11 paper aeroplanes on the first day. Each day he did 10 more paper aeroplanes than the previous day. On the last day, he made 141 aeroplanes. How many days did he fold paper aeroplanes?