Asked by vanessa

All the numbers from 1 to 99 are multiplied together. Use a pattern to determine the last digit of the product. Justify your answer.
Answered by jim
It's a very simple pattern, really. :-)

Think what happens to the last digit of any number when multiplied by ten.
Answered by vanessa
im sorry but i do not understand :(
Answered by jim
Take any digit, say 2.

Multiply it by 10.

What's the last digit?

Multiply that by anything else. What's the last digit?
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