Mathematics, 26.06.2019 01:00 kate9627

When jessica multiplied 2x3x15, she touched a key on her calculator 7 times. if she multiplies all the numbers from 3 to 21 (including 3 and 21), how many times will she touch a key on her calculator?

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When jessica multiplied 2x3x15, she touched a key on her calculator 7 times. if she multiplies all t...