Sum_ap = ½ × number_of_terms × (first_term + last_term) For the first 88 multiples of three: number_of_terms = 88 first_term = 1 × 3 = 3 last_term = 88 × 3 = 264 → Sum = ½ × 88 × (3 + 264) = 44 × 267 = 11748
224 and 226
88
Two positive integers cannot have a sum which is negative!
83, 3, 2
The sum of 88 and 11 is 99.
226, 88, 34.
If the sum of 5 = 28 then the average is 28 / 5 = 5.6 If the sum of the squares = 226 then the average is 226 / 5 = 45.2 From this information, and by a process of elimination, the numbers might be 1, 2, 6, 8 and 11.
Radium 226 has 88 protons, 88 neutrons, and 138 electrons.
Find 2 consecutive ODD integers whose sum is -88 ANSWER: -45, -43
3 + 88 = 91
-88
Sum_ap = ½ × number_of_terms × (first_term + last_term) For the first 88 multiples of three: number_of_terms = 88 first_term = 1 × 3 = 3 last_term = 88 × 3 = 264 → Sum = ½ × 88 × (3 + 264) = 44 × 267 = 11748
?
88
224 and 226
The atomic number is 88 and the atomic mass is 226