Adv
AnilSinghBora
  • 1
Guru

Find the sum of the odd numbers between 0 and 50. Q.14

  • 1

The tricky question of class 10th math of arithmetic progressions ncert how i solve the problem of this question in easy way Find the sum of the odd numbers between 0 and 50.

Share

1 Answer

  1. The odd numbers between 0 and 50 are 1, 3, 5, 7, 9 … 49.

    Therefore, we can see that these odd numbers are in the form of A.P.

    Hence,

    First term, a = 1

    Common difference, d = 2

    Last term, l = 49

    By the formula of last term, we know,

    l = a+(n−1) d

    49 = 1+(n−1)2

    48 = 2(n − 1)

    n − 1 = 24

    n = 25 = Number of terms

    By the formula of sum of nth term, we know,

    Sn = n/2(a +l)

    S25 = 25/2 (1+49)

    = 25(50)/2

    =(25)(25)

    = 625

    • 0
Leave an answer

Leave an answer

Browse

Choose from here the video type.

Put Video ID here: https://www.youtube.com/watch?v=sdUUx5FdySs Ex: "sdUUx5FdySs".

Captcha Click on image to update the captcha.

Related Questions