Home
Class 10
MATHS
Find the sum of the A.P. : 14, 21, 28………...

Find the sum of the A.P. : 14, 21, 28………….. 168.

Text Solution

Verified by Experts

The correct Answer is:
n=23 and sum =2093
Promotional Banner

Topper's Solved these Questions

  • ARITHMETIC PROGRESSION

    ICSE|Exercise Exercise 10E|5 Videos

  • BANKING

    ICSE|Exercise Competency Based Questions|10 Videos

Similar Questions

Explore conceptually related problems

How many terms of the A.P. : 24, 21, 18,…………... must be taken so that their sum is 78 ?

Find the sum of terms of the A.P: 4, 9, 14,…., 89.

Find the 25th term of the A.P. 6, 10, 14, ...

Find the sum of the first 22 terms of the A.P. : 8, 3, -2,………….

Find the sum of 20 terms of the A.P. 1,4,7,10…..

Find the sum to 25 terms of the A.P. 5, 7, 9, 11, …

Find the sum of 50 terms of the A.P. 1 + 4 + 7 + ....

Find the maximum sum of the A.P. 40 +38+36+34+32+……………

Find the sum of first 10 terms of the A.P. 4+6+8+………

Find the number of terms of the A.P. -12 ,\ -9,\ -6,\ dot,\ 12 . If 1 is added to each term of this A.P., then find the sum of all terms of the A.P. thus obtained.

ICSE-ARITHMETIC PROGRESSION-Exercise 10F
  1. Find the sum of first 20 terms of an A.P. whose first term is 3 and th...

    Text Solution

    |

  2. How many terms of the series 18 + 15 + 12 +…………... when added together...

    Text Solution

    |

  3. The nth term of a sequence is 8 -5n. Show that the sequence is an A.P.

    Text Solution

    |

  4. Find the general term (nth term) and 23rd term of the sequence 3, 1, -...

    Text Solution

    |

  5. Which term of the sequence 3, 8, 13, is 78?

    Text Solution

    |

  6. Is -150 a term of 11, 8, 5, 2…………

    Text Solution

    |

  7. How many two digit numbers are divisible by 3?

    Text Solution

    |

  8. How many multiples of 4 lie between 10 and 250 ?

    Text Solution

    |

  9. The sum of the 4th term and the 8th term of an A.P is 24 and the sum o...

    Text Solution

    |

  10. The sum of first 14 terms of an AP is 1050 and its 14th terms 140. Fin...

    Text Solution

    |

  11. The 25th term of an A.P. exceeds its 9th term by 16. Find its common d...

    Text Solution

    |

  12. For an A.P., show that (m +n)th term + (m-n) term =2 xx m th term

    Text Solution

    |

  13. If the nth term of the A.P. 58, 60, 62, is equal to the nth term of th...

    Text Solution

    |

  14. Which term of the A.P. 105, 101, 97,………. the first negative term is

    Text Solution

    |

  15. How many three digit numbers are divisible by 7 ?

    Text Solution

    |

  16. Divide 216 into three parts which are in A.P. and the product of two s...

    Text Solution

    |

  17. Can 2n^2+ 7 be the nth term of an A.P. ? Explain.

    Text Solution

    |

  18. Find the sum of the A.P. : 14, 21, 28………….. 168.

    Text Solution

    |

  19. The first term of an A.P. is 20 and the sum of its first seven terms i...

    Text Solution

    |

  20. Find the sum of last 8 terms of the A.P. -12,-10,-8,……..,58.

    Text Solution

    |