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Question

The sum of the expression 551 + 552 + 553 + . . . .+ 560 is:


Your Answer
A
3450
Correct Answer
B
5555
Your Answer
C
555
Your Answer
D
6060

Solution

The correct option is B 5555
551 + 552 + 553 + . . . + 559 + 560
= (500 + 500 + 500 . . . 10 times) + (51 + 52 + 53 + . . . + 60)
= 5000 + (50 + 50 + 50 . . . 10 times) + (1 + 2 + 3 + . . . + 10)
= 5000 + 500 + 55 = 5555

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