Question

+ 20 = 155 11 + 12 + 13 + + 20 (101)
10. It is given that 1 + 2 + 3 + 4 +
+ 10 = 55
So, 11 + 12 + 13 +
+ (10 + 2) + .... + (10 + 10) = 100 + 551
Using the above pattern, evaluate the following:
(i) 31 + 32 + 33 + ............ + 40
(ii) 101 + 102 + 103 + ..... + 110
(iii) 991 + 992 + 993 +
...... + 1000​

Answer 1

Step-by-step explanation:

1. 34
2. 104
3. 994

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