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Along a road lie an odd number of stones...

Along a road lie an odd number of stones placed at intervals of 10 metres. These stones have to be assembled around the middle stone. A person can carry only one stone at a time. A man carried the job with one of the end stones by carrying them in succession. In carrying all the stones he covered a distance of 3 km. Find the number of stones.

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RD SHARMA ENGLISH-ARITHMETIC PROGRESSIONS-All Questions
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  2. If n arithemetic means are inserted between 20 and 80 such that the ra...

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  3. Along a road lie an odd number of stones placed at intervals of 10 met...

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  4. A carpenter was hired to build 192 window frames. The first day he mad...

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  5. In a potato race 20 potatoes are placed in a line at intervals of 4m e...

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  6. We know that the sum of the interior angles of a triangle is180^0 . S...

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  7. If S1 be the sum of (2n+1) term of an A.P. and S2 be the sum of its od...

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  8. Divide 32 into four parts which are in A.P. such that the product of ...

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  9. If theta1,theta2,theta3, ,thetan are in AP, whose common difference ...

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  10. If (m+1) term of an A.P. is twice the(n+1) th term, prove that (3m+1) ...

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  11. If a1,a2,a3, ,an are in A.P. with common difference d(w h e r ed!=0), ...

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  12. If an A.P. is such that (a4)/(a7)=2/7, find (a6)/(a8) .

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  13. The 4th term of an A.P. is three times the first and the 7th term e...

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  14. Find the number of terms common to the two AP's 3,7,11,15.... 407 and...

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  15. the sum of terms equidistant from the beginning and end in an A...

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  16. If a1,a2,a3, ,an are an A.P. of non-zero terms, prove that 1/(a1a2)+...

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  17. If a1,a2,a3, ,an are in A.P., where ai >0 for all i , show that 1/...

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  18. The p^(t h) term of an A.P. is a and q^(t h) term is b Prove that t...

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  19. If S1,S2, S3, Sm are the sums of n terms of m A.P. ' s whose first ter...

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  20. Let Sn be the sum of first n terms of an A.P. with non-zero common d...

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