There are 20 bicycles and 10 cars parked in the parking lot. Each bicycle had two wheels and each car had four wheels. How many wheels are there in total?

4 answers

Ummhhh, what is 20*2 + 10*4 ??

(on line * is used as a multiplication sign)
I already know that
Well, you didn't know what 20*2+10*4 was, so I assumed nothing.
And I opppp
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