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(HELP PO PASAHAN NAPO)

worksheet 6- arithmetic series
l. Solve the following problems
1. 10 + 15 + 20 + 25 + 30 + 35 + 40 + 45 + 50 + 55 + 60 + 65
2. Find the sum of all even numbers from 1 to 60
3. find the sum of all the odd numbers from 1 to 30

ll. Find the sum of each arithmetic series
1. 3 + 6 + 9 +... S20
2. 20 + 14 + 8 +... S12
3. 1 + 5 + 9 +... S17​