enigma123 wrote:
What is the sum of all of the integers in the chart above?
A. 0
B. 300
C. 500
D. 1500
E. 6500
We don’t have actually add up all the numbers; we can just approximate the sum. Let’s add the numbers column by column.
We see that the 5 numbers in the first column are each about 100, so the sum is approximately 500. The 5 numbers in the second column are each about -200, so the sum is approximately -1000. The 5 numbers in the third column are each about 300, so the sum is approximately 1500. The 5 numbers in the fourth column are each about -400, so the sum is approximately -2000. Lastly, the 5 numbers in the fifth column are each about 500, so the sum is approximately 2500.
Therefore, the sum of all 25 numbers is approximately 500 + (-1000) + 1500 + (-2000) + 2500 = 4500 - 3000 = 1500
Answer: D.
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