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units digit

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The tens digit of a number is five times the unit digit 2016-05-19
From sanjeev:
The tens digit of a number is five times the unit digit. Find the number?
Answered by Penny Nom.
The units digit of a prime 2015-01-08
From Patricia:
Every prime number greater than 10 has a digit in the ones place that is included in which set of numbers below 1 3 7 9 or 1 3 7 or 0 2 4 5 6 8 or 1 3 5 9
Answered by Walter Whiteley.
Units digit 2014-01-03
From gracie:
9^23 units digit
Answered by Penny Nom.
The units digit 2012-09-11
From Shaunice:
Simplify each of the following expressions and determine what the last digit would be. a. (24^15) 4
Answered by Penny Nom.
The units digit of a prime number 2011-11-22
From Mike:
Every prime number larger than 10 has a digit in the ones place that is included in which set of numbers below?
A. 1,3,7,9
B. 1,3,5,9
C. 0,2,4,5,6,8
D. 1,3,7

Answered by Penny Nom.
A two digit number 2011-03-01
From jhoanna:
the sum of the digits of a two digit number is 10. The value of the number is 16 times the units digit.Find the number.
Answered by Penny Nom.
Units digit 2009-07-23
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.
Units digit 2009-04-15
From A student:
What is the unit digit of 47 to the 43rd power? Please answer as soon as possible. Thank you.
Answered by Stephen La Rocque.
The units digit of 2^95 2009-03-18
From Sharvon:
what is the units digit of 2^95
Answered by Robert Dawson.
The units digit is 5 2009-02-02
From Ray:
the number that when squared the units digit is 5
Answered by Penny Nom.
The 2 rightmost digits 2008-12-18
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.
The units digit of (7*3)^21 2008-07-16
From surender:
what will be the unit digit of (7*3)^21?plz give me method 2 calculate such problems.thank you.
Answered by Penny Nom.
Units digit 2008-07-02
From seemachauhan:
How to find unit digit of various numbers and what are unit digits?
Answered by Penny Nom.
Units digit 2008-01-11
From Robin:
hello - my question is: what is the units digit of (13) to 4; (17) to 2 and (29) to 3 [(13)4(17)2(29)3]

(possible answers: 9 or 7 or 5 or 3 or 1)

Answered by Penny Nom.
The sum of the ones 2007-10-29
From Hangsun:
When 2 two digit numbers are added what is the greatest possible sum of the ones?
Answered by Penny Nom.
The units digit of 23^45 + 67^89 2007-08-16
From Christopher:
What is the units digit of 23 to the 45th power plus 67 to the 89th power?
Answered by Stephen La Rocque.
The units digit of 9^2006 + 3^2006 2007-01-30
From Ryan:
What is the units digit of the sum of 9^2006 and 3^2006
Answered by Penny Nom.
The units digit 2007-01-09
From Tyrone:
This may be a dumb question, but what is the unit digit of two digits, eg: 62 or 13 or 45.
Answered by Steve La Rocque and Diane Hanson.
The units digit of 1^5 + 2^5 + ... + 2006^5 2006-11-14
From Lana:
Compute the unit's digit of :
1 to the power of 5 + 2 to the power of 5 + 3 to the power of 5 + 4 to the power of 5 + 5 to the power of 5 + 6 to the power of 5 + ... + 2006 to the power of 5 .

Answered by Stephen La Rocque and Penny Nom.
The units digit 2006-03-05
From Taran:
My teacher asked: What is the unit's digit in the product 5 X 10 X 15 X 20 X 25? What is a "unit's digit", what are they asking for?
Answered by Penny Nom.
What is the unit's digit? 2005-10-04
From Alex:

Question: What is the unit's digit of the following problem?

3155 + 7412 (3 to the 155th power + 7 to the 412th power.)


Answered by Penny Nom.
n^2+n-1 has no divisors ending with 3 or 7 2005-09-08
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.
The last digit of a large exponent 2004-10-20
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.
The last digit of 2^28 2004-09-25
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.
The units digit of 57 to the 28th power 2003-09-01
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.
The units digit of 2 to the power of 31921 2002-12-18
From A student:
If 2 to the power of 31921 is multiplied out, what will be the units digit?
Answered by Penny Nom.
The units digit of 3 to the 58th power 2000-05-10
From Kylie Mcalpine:
the questions we have been asked are what is the units digit of the following:

a) 358
b) 2358
c) 1731

and the harder question of:

what is the units digit of the following sum: 13841 + 17508 + 24617 = ???????


Answered by Paul Betts and Penny Nom.
 
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