Question

.Calculate the total

a) 1+2 +3+………..+20

b) 3+6+9+…………+60

c) 5 +8 +11+……….+62​

Answer 1

Answer:

a) 26

b) 78

c) 86

Hope it's help you

Answer 2

Answer:

a. 210

b. 660

c. 670

Step-by-step explanation:

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