17 actually.
There were 31 presidents now, there is 32 because of obama.
There are 257,100 (100% disabled veterans as of 12/31/07) according to the U.S. Department of Veterans' Affairs.
31 - 24 = 7
24, there are 24 stars on the flag in 1822
24 goes into 31 once with a remainder of 7. This can be calculated by dividing 31 by 24, which equals 1 with a remainder of 7. In other words, 24 multiplied by 1 is 24, and adding the remainder of 7 gives the original number 31.
24 to 31 degrees north
Each day has 24 hours, so this simple multiplication is needed to calculate the number of hours in 31 days: 24 * 31 = 774 hours.
There are 24 hours in a day and so 31 times 24 = 744 hours
Many of the former Presidents of the United States have served in one way or another as a man in uniform for the United States. A total of 31 Presidents were soldiers before taking office, ranging from Privates to General of Armies.
24 out of 31 is 77.42%
31% of 24 = 7.44
(-31) x 24 = -744