A few days ago
A computer multiplied nine 100 times. You can use patterns to find the ones digit of the product.?
Find the ones digit when nine is multipled
What is the ones digit of the computer’s product?
Top 2 Answers
A few days ago
Favorite Answer
Assume Ds are undefined digits:
DDD9 X 9 = DDD1
DDD1 X 9 = DDD9
The first time (9X9) is like the first one (Ds are all 0).
The second time, the ones digit returns to 9.
The next multiplication is like the first example, so we are in a loop.
If we say the 1st line is (2) 9s multiplied, then every even number of multiplications results in a “1” as the 1s digit.
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A few days ago
This question is worded so badly? nine multiplied 100 times is just 9^100…”Find the ones digit when nine is multiplied”?????
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