Find the sum of all the natural numbers ...

Find the sum of all the natural numbers between 1 and 200 which are neither divisible by 2 nor by 5.

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The correct Answer is:

7999

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CBSE COMPLEMENTARY MATERIAL-SEQUENCES AND SERIES -SECTION-C(SHORT anwer type )

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Find the sum of the sequence, 72 + 70 + 68 + ………. + 40
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If in an A.P (a(7))/(a(10))=(5)/(7),find (a(4))/(a(7))
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The sum of first four terms of an A.P. is 56 and the sum of it's last ...
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solve: 1 + 6 + 11 + 16 +.........+ x = 148
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The ratio of the sum of n terms of two A.P.'s is (7n-1): (3n +11), fin...
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If the first, second and the last terms of an A.P. are a,b,c respectiv...
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If (b+c-2a)/(a), (c+a-2b)/(b),(a+b-2c)/(a) are in A.P then show that (...
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The product of first three terms of a G.P. is 1000. If 6 added to its ...
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If the continued product of three numbers in G.P. is 216 and the sum o...
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if A=1+r^a+r^(2a)+......... up to infinity then express r in terms of ...
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Find the sum of first n terms of the series 0.7 + 0.77 + 0.777 + …..
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"If "x=a+(a)/(r)+(a)/(r^(2))+...oo,y=b-(b)/(r)+(b)/(r^(2))-...oo,"and ...
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The sum of first three terms of a G.P. is 15 and sum of next three ter...
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Prove that 0.0031=7/225 [Hint: 0.031 = 0.03 + 0.001 + 0.0001 +.....Now...
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If a ,\ b\ c are in G.P., prove that the following are also in G.P.: a...
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If a ,\ b\ c are in G.P., prove that the following are also in G.P.: a...
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