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Find the sum ofthe first 40 positive int...

Find the sum ofthe first 40 positive integers divisible by 6.

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Knowledge Check

  • If the sum of first n positive integers is 1/5 times the sum of their square then n equals

    A
    5
    B
    6
    C
    7
    D
    8

  • The product of r consecutive positive integers is divisible by

    A
    r!
    B
    (r-1)!
    C
    (r+1)!
    D
    `r^(r ) `

  • The product of r consecutive positive integers is divisible by

    A
    `r!`
    B
    `(r-1)!`
    C
    `(r+1)!`
    D
    `r^(r)`

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    Find the sum of integers from 1 to 100 that are divisible by 2 or 5.

    The first term of an infinite geometric series is 21. The second term and the sum of the series are both positive integers. Then which of the following is not the possible value of the second term 12 b. 14 c. 18 d. none of these

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