12
7 decades since a decade is 10 years long
1932
The answer is 2009 because 4 decades = 40 years and 1969 + 40 = 2009
There are 3.5 decades in 35 years
1 year = 12 months 1 decade = 10 years = 10*12 = 120 months 10 decades = 10*120 = 1200 months
More then 1589
1589
There are 12 decades in a 120 year period.
Ten
0.1
7 decades which is 70 years
1589 = 1 x 1589
77 decades and 1 year 77.1 x 10 = 771
The factors of 1589 are: 1, 7, 227, 1589.
1589 is not prime. 1589 = 7 * 227
30 years
20