Question

Find the following sums

a. 1 + 2 + 3 + ..............+ 50

b. 1 + 3 + 5 + .............+ 49

c. 2 + 4 + 6 + ...........+ 50

d. 3 + 7 + 11 + ...........+ 99​

Answer 1

Answer:

a. 1275

b. 625

c. 650

d. 1275

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Answer 2

Answer:

n(n+1)/2

1) 926

2) 1225

3) 926

4) 4950