9 items are filed under this topic.
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Units digit |
2014-01-03 |
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From gracie:
9^23 units digit
Answered by Penny Nom. |
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The units digit |
2012-09-11 |
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From Shaunice:
Simplify each of the following expressions and determine what the last
digit would be.
a. (24^15) 4
Answered by Penny Nom. |
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Units digit |
2009-07-23 |
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From Jyll:
How do solve for the units digit? And that, what is the units digit of the first 1000 prime numbers?
Answered by Robert Dawson. |
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The units digit of 2^95 |
2009-03-18 |
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From Sharvon:
what is the units digit of 2^95
Answered by Robert Dawson. |
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The 2 rightmost digits |
2008-12-18 |
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From Peter:
Is there a pattern for the 2 rightmost digits of a power? For example, one problem for a math competition was what are the 2 rightmost digits of 3^1993?
Answered by Robert Dawson and Victoria West. |
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n^2+n-1 has no divisors ending with 3 or 7 |
2005-09-08 |
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From Arne:
at least it seems like for any integers n and k,
10k+3 and 10k+7 do not divide nē+n-1
I tested this for every n from 0 to 3200 (which means same for the numbers from -3201 to -1)
could this be true, or is it just coincidence, or am I just totally wrong?
Answered by Richard McIntosh. |
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The last digit of a large exponent |
2004-10-20 |
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From Landon:
How can one determine the last digit of a large exponent by hand. I have seen several examples of how to do this by breaking it up into smaller exponents, but is there a formula or some common things to look for?
Answered by Penny Nom. |
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The last digit of 2^28 |
2004-09-25 |
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From A student:
I am currently enrolled in a math reasoning class and a math question I have to answer is determine the units digit in 3 28power. When I set up a table and keep cubing the numbers, I find a pattern with the last digits of the numbers that follow 1,3,9,7. My calculator gets to about the 19th power, and then I get an error. If I continued the pattern, would the units digit then be the last digit of 3 28th power, which would be a 7? Please let me know if I am solving this correctly and what a unit's digit actually is.
Answered by Penny Nom. |
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The units digit of 57 to the 28th power |
2003-09-01 |
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From Maria:
If 57 is raised to the 28th power, what must be the units digit in the result? If you raise 7 to the 500th power, what is the numeral that will appear in the units digit position?
Answered by Penny Nom. |
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