S = 955 This is an arithmetic sequence, and the sum of an arithmetic sequence can be calculated as: S = n/2 x (U1 + Un) U1 is the first term (in this case 91) and Un is the last term (in this case 100). n presents the total number of terms in the sequence There are 10 numbers in this sequence (91, 92, 93, 94, 95, 96, 97, 98, 99, 100) So, the sum is : S = 10/2 x (91+100) = 955
The lowest common multiple of 84 and 96 is 672
Both 84 and 96 are divisible by 12, so 84/96 = 7/8.
What should be the next number in the following series? 100 96 104 88 120 56
12, 24, 36, 48, 60, 72, 84, 96.
It does not "mean" anything. t(n) = 100 - (n-1)2, n = 1, 2, 3, ... or equivalently, t(n) = (11 - n)*(9 + n)
84 + 96 + 72 + 77 + 91 = 420
80, 81, 82, 84, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99, 100.
91.
80, 81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99, 100
S = 955 This is an arithmetic sequence, and the sum of an arithmetic sequence can be calculated as: S = n/2 x (U1 + Un) U1 is the first term (in this case 91) and Un is the last term (in this case 100). n presents the total number of terms in the sequence There are 10 numbers in this sequence (91, 92, 93, 94, 95, 96, 97, 98, 99, 100) So, the sum is : S = 10/2 x (91+100) = 955
(100+65+93+84+90+96) ÷ 6 = 88 is the average
5
80, 81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99, 100
82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
91, 92, 93, 94, 95, 96, 98, 99, 100
60, 72, 84, 90 and 96