The factors that they share. Example: 30 and 42 1,2,3,5,6,10,15,30 1,2,3,6,7,14,21,42 1,2,3 and 6 are the common factors, the factors in common.
The common factors of 56 and 18 are 1 and 2.
Do you mean all the factors? I'm not sure what "common factors" is?
The common factors are: 1, 2
Five common factors.
They both read the same when rotated 180 degrees.
They both read the same when rotated 180 degrees.
6009 6969 9696 11111 19610 119611
The year 1961 was rotationally symmetric.This means that if you turned 1961 upside down (180 degrees), it would still say "1961".The next time this will occur is in the year 6009.It only works with the following numbers:1 rotates to 16 rotates to 98 rotates to 89 rotates to 60 rotates to 0
6009-28767654 = -28761645
the year reads the same when turned upside down! it will happen again in 6009!
The year 1961 can be read upside down and that won't happen again until 6009
In 1961, the calendar year aligned with the same numeric sequence as the year when read upside down (1961 looks the same when rotated 180 degrees). This won't happen again until 6009 because the next occurrence will be in the year 6009, where the numeric sequence and its upside-down version will match.
1961- this won't happen again until 6009. what about 2005?
1961 was the last year that read the same upside down and right side up. After 1961, the next year that will satisfy this condition is 6009.
The positive integer factors of 1961 are: 1, 37, 53, 1961
That's correct. The only "invertable" digits, assuming a non-serif font, are 0, 1, 6, and 9. Thus the next common-era year that begins with an invertable digit would be in the 7th millennium, i.e. the 6000sm and the smallest possible invertable digit after 6 is 0.