200 logs are stacked in the following ma...

200 logs are stacked in the following manner : 20 logs in the bottom row, 19 in the row above, 18 in the row above to it and so on. In how many rows are the 200 logs placed and how many logs are in the top row ?

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VGS PUBLICATION-BRILLIANT-PROGRESSIONS-EXERCISE

In a school, students thought of planting trees in an around the schoo...
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A sprial is made up of successive semicircles, with centres alternatel...
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200 logs are stacked in the following manner : 20 logs in the bottom r...
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In a bucket and ball race, a bucket is placed at the starting point. W...
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A runner starts from the bucket, picks up the nearest ball, runs back ...
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Find which of the following are not G.P. (i) 6,12, 24, 48, ......
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Find which of the following are not G.P. (ii) 1,4,9,16,.....
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Find which of the following are not G.P. (iii) 1, -1, 1, -1,......
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Find which of the following are not G.P. (iv) -4, -20, -100, -500,....
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Explain why each of the lists above is a G.P. (i) 1, 4, 16, 64, 256,...
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Explain why each of the lists above is a G.P. (ii) 550, 605, 665.5, ...
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Explain why each of the lists above is a G.P. (iii) 256, 128, 64,32,...
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Explain why each of the lists above is a G.P. (iv) 18, 16.2, 14.58, ...
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To know about a G.P. What is minimum information that we need?
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Write the G.P. If the first term a=3, and the common ratio r= 2.
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Write G.P. If a = 256, r = (-1)/2.
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Find the common ratio of the G.P. 25, -5, 1, (-1)/5.
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Which of the following list of number form G.P. ? (i) 3, 6, 12, .......
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Which of the following list of number form G.P. ? (ii) 64, -32, 16, ...
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Which of the following list of number form G.P. ? (iii) 1/64, 1/32, ...
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