40
40.
The sum of 7 and 19 is 26.
The sum of the first 40 whole numbers is 780.
26/40 = 26 divided by 40 = 0.65
The sum of the first 40 odd numbers is 1,600.
The sum of the first 40 even numbers is 1,640.
It is 19+26 = 45
The answer is 52: 26 + 26 = 52
The father is 40 and his son is 14, a difference of 26 years and their combined ages equal 54.
The sum of the numbers is 26. The numbers are 12 and 14.
The sum of addends 11 and 15 is: 11 + 15 = 26