Aptitude · all questions

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Q61

If four numbers in A.P. are such that their sum is 50 and the greatest number is 4 times the least, then the numbers are

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Q62

Open question

If S₁ is the sum of an arithmetic progression of ‘n’ odd number of terms and S₂ is the sum of the terms of the series in odd places, then

\frac{S _{1}}{S _{2}}

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Q63

Open question

If the first term of an A.P. is 2 and common difference is 4, then the sum of its 40 term is

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Q64

Open question

The n^th term of an A.P., the sum of whose n terms is S_n, is

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Q65

Open question

The sum of first n odd natural numbers in

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Q66

Open question

The sum of n terms of an A.P. is 3n² + 5n, then 164 is its

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Q67

Open question

The common difference of the A.P.

\frac{1}{3},

\frac{1 - 3 b}{3},

\frac{1 - 6 b}{3},

. . . . . . is

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Q68

Open question

If the sum of p terms of an A.P. is q and the sum of q terms is p, then the sum of (p + q) terms will be

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Q69

Open question

If the sum of three consecutive terms of an increasing A.P. is 51 and the product of the first and third of these terms is 273, then the third term is :

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Q70

Open question

If the first, second and last term of an A.P. are a, b and 2a respectively, its sum is

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Q71

Open question

If S_n denotes the sum of the first r terms of an A.P. Then, S_3n : (S_2n – S_n) is

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Q72

Open question

\frac{1}{x + 2},

\frac{1}{x + 3},

\frac{1}{x + 5}

are in A.P. then x = ?

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Q73

Open question

If the first term of an A.P. is a and nth term is b, then its common difference is

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Q74

Open question

\frac{5 + 9 + 13 + ... to n terms}{7 + 9 + 11 + ... to ( n + 1 ) terms}

= \frac{17}{16},

then n = ?

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Q75

Open question

The common difference of the A.P. is

\frac{1}{2 q},

\frac{1 - 2 q}{2 q},

\frac{1 - 4 q}{2 q},

. . . . is

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Q76

Open question

The first three terms of an A.P. respectively are 3y – 1, 3y + 5 and 5y + 1. Then, y equals

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Q77

Open question

If 7^th and 13^th terms of an A.P. be 34 and 64 respectively, then its 18^th term is

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Q78

Open question

If the sum of it terms of an A.P. is 2n² + 5n, then its nth term is

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Q79

Open question

If the sum of first n even natural number is equal to k times the sum of first n odd natural numbers, then k =

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Q80

Open question

In an AP, S_p = q, S_q = p and S denotes the sum of first r terms. Then, S_p+q is equal to

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