The number of terms of the A.P. 3, 7, 11, 15, ....... to be taken so that the sum is 406 is
5
10
12
14
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#  Quiz 

1
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If Sn denote the sum of the first n terms of an A.P. If S2n = 3Sn , then S3n : Sn is equal to
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2
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In an A.P., if d = 4, n = 7, an = 4, then a is
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3
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The sum of first five multiples of 3 is:
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4
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How many 2digit positive integers are divisible by 4 or 9?
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5
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If 7 times the seventh term of an Arithmetic Progression (AP) is equal to 11 times its eleventh term, then the 18th term of the AP will be
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6
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The nth term of an A.P., the sum of whose n terms is Sn, is
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7
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The 7th and 12th term of an arithmetic progression are 15 and 5 respectively. What is the 16th term?
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8
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How many terms are there in 20, 25, 30 . . . . . . 140?
Solution 
9
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If the sums of n terms of two arithmetic progressions are in the ratio \(\frac{{3n + 5}}{{5n + 7}}\) then their nth terms are in the ration
Solution 
10
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If a + 1, 2a + 1, 4a  1 are in A.P., then the value of a is:
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