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I m not sure about the first question, but for Q6, I think I might have an idea. From 140 to 133, the difference is 7. From 133 to 126, the difference is 7 also. From here, you can get the idea that the difference between each number is 7. Let's take 140 to be 'x'. If 'x' is 140, then 133 is 'x-7', and 126 is 'x-14', ans so on and so forth. You said there were 33 terms. That means, the sum will be: x + (x - 7) + (x -14) + (x - 21)... + (x - 224) The last number is (x - 224) because 32 x 7 is 224. Each time, the number will decrease by 7. Just add everything up. You will get 33x - (7+14+21...+224). Solve it. 33x - 3696 Since x = 140, 33x = 4620, and 33x - 3696 = 4620 - 3696 = 924 That is the answer:)
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