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How many terms of A.P. -6, (-11)/2 , -5 ...

How many terms of A.P. `-6, (-11)/2 , -5` …… are needed to obtain a sum -25?

A

10 or 15

B

15 or 18

C

5 or 20

D

8 or 12

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The correct Answer is:
C
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VGS PUBLICATION-BRILLIANT-PROGRESSIONS-Creative Bits for CCE Model Examination
  1. How many terms of A.P. -6, (-11)/2 , -5 …… are needed to obtain a sum ...

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  2. The sum of natural numbers from 1 to 100 is

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  3. The sum of first 50 even numbers is

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  4. The sum of first 20 odd numbers is

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  5. If x-1, x+3, 3x-1 are in A.P., then x is equal

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  6. The numbers -15, -11,-7,-3, is …………is

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  7. The next term of the A.P. sqrt(48), sqrt(75),sqrt(108), sqrt(147), …...

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  8. Which term of the Arithmetic Progression 24, 21, 18, ……. Is the first ...

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  9. Which term of the A.P. 125, 120, 115, ……….. Is the first negative?

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  10. Which term of the A.P 100 , 90, 80, ……….. Is zero?

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  11. (a+3d), (a+d), (a-d), ………… the next term of the A.P. is

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  12. The sum of 15 terms of the A.P. 4, 7, 10, ………. Is

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  13. If a(7) - a(3) = 32, then the common difference of the A.P. is

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  14. a(28)-a(23) = 15, then the common difference of the A.P. is

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  15. if a, b,c are in A.P. then b =

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  16. The 17^(th) term of 1.1, 2.2, 3.3, 4.4, ………….. Is

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  17. The 25^(th) term of -300, -290, -280,………. is

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  18. How many numbers are divisible by 4 lying between 101 and 250 ?

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  19. The common ratio of the G.P. 3, 6, 12, 24, ………. Is

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  20. The common ratio of the G.P. 144, 36, 9,………… is

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