Question

7. Find the sum of
a) 1+2+3++40
b) 2+4+6+ +80
c) 3+6+9+ +120
d) 5+8+11++122​

Answer 1

Answer:

a) 1 + 2 + 3 + 4 + 40 = 50

b) 2 + 4 + 6 + 8 + 80 = 100

c) 3 + 6 + 9 + 12 + 120 = 150

d) 5 + 8 + 11 + 16 + 122 = 162

Step-by-step explanation:

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Answer 2

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