enigma123 wrote:

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What is the sum of all of the integers in the chart above?

A. 0

B. 300

C. 500

D. 1500

E. 6500

Sum of the first column = 5*100 = 500.

Sum of the last column = 500+5*400 = 2500[As all the corresponding terms are increased by 400]

Sum of the second column = 5*-200 = -1000

Sum of the fourth column = -1000-5*200 = -2000

The total sum = 500+2500-1000-2000 = 0

Thus everything when added gets cancelled. Except the inner column. That is an AP and the sum = 5*300 = 1500.

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