find the sum of intergers which are divisible by 2 and 3 from 1 to 50 ?
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The first number that's divisible by 2 after 11 is 12, while the last number is 50.....
Writing out all the numbers, we've...
12,14,16, ..., 50
a=12 , d=2, l=50
The total numbers from 12 to 50 is 20
Using the formula for sum
Sn = n/2 (a+l) = 20/2 (12+50) = 10 (62) = 620
Writing out all the numbers, we've...
12,14,16, ..., 50
a=12 , d=2, l=50
The total numbers from 12 to 50 is 20
Using the formula for sum
Sn = n/2 (a+l) = 20/2 (12+50) = 10 (62) = 620
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