Maths-
General
Easy

Question

Digit at unit place of sum (1!)2 +(2!)2 +(3!)2 ……… +(2008!)2 is

  1. 5
  2. 7
  3. 9
  4. None

The correct answer is: 7


    becauseS = 1 + 4 + 36 + 576 + …….. +(2008!)2= 617 + all other terms will have 0 at unit place

    Related Questions to study

    General
    maths-

    A person writes letters to 6 friends and addresses the corresponding envelopes. In how many ways can the letters be placed in the envelopes so that at least 4 of them are in wrong envelopes ?

    A person writes letters to 6 friends and addresses the corresponding envelopes. In how many ways can the letters be placed in the envelopes so that at least 4 of them are in wrong envelopes ?

    maths-General
    General
    maths-

    The total numbers of integral solutions for (x,y,z) such that xyz = 24 is

    The total numbers of integral solutions for (x,y,z) such that xyz = 24 is

    maths-General
    General
    maths-

    Number of ways in which 5 different toys can be distributed among 5 children if exactly one child do not get any toy

    Number of ways in which 5 different toys can be distributed among 5 children if exactly one child do not get any toy

    maths-General
    parallel
    General
    maths-

    A seven digit number is in form of abcdefg (g, f, e, etc. are digits at units, tens, hundred place etc.) where a < b < c < d > e > f > g. The number of such numbers are

    A seven digit number is in form of abcdefg (g, f, e, etc. are digits at units, tens, hundred place etc.) where a < b < c < d > e > f > g. The number of such numbers are

    maths-General
    General
    maths-

    Number of ways in which 25 identical balls can be distributed among Ram, Shyam, Sunder and Ghanshyam such that atleast 1, 2, 3, and 4 balls are given to Ram, Shyam, Sunder and Ghanshyam respectively, is-

    Number of ways in which 25 identical balls can be distributed among Ram, Shyam, Sunder and Ghanshyam such that atleast 1, 2, 3, and 4 balls are given to Ram, Shyam, Sunder and Ghanshyam respectively, is-

    maths-General
    General
    maths-

    One hundred identical marbles are to be distributed to three children so that each gets atlest 20 and no two get equal number. The number of ways  of doing this is -

    One hundred identical marbles are to be distributed to three children so that each gets atlest 20 and no two get equal number. The number of ways  of doing this is -

    maths-General
    parallel
    General
    maths-

    The number of five-digit telephone numbers having at least one of their digits repeated is

    The number of five-digit telephone numbers having at least one of their digits repeated is

    maths-General
    General
    maths-

    The maximum value of P such that 3P divides 99 × 97 × 95 × .... × 51 is-

    The maximum value of P such that 3P divides 99 × 97 × 95 × .... × 51 is-

    maths-General
    General
    maths-

    If f left parenthesis x right parenthesis equals fraction numerator x over denominator 1 plus vertical line x vertical line end fraction for x element of R, then f to the power of straight prime left parenthesis 0 right parenthesis equals

    If f left parenthesis x right parenthesis equals fraction numerator x over denominator 1 plus vertical line x vertical line end fraction for x element of R, then f to the power of straight prime left parenthesis 0 right parenthesis equals

    maths-General
    parallel
    General
    maths-

    The largest value of r satisfying inequality 20Cr greater or equal than 320Cr – 1 is -

    The largest value of r satisfying inequality 20Cr greater or equal than 320Cr – 1 is -

    maths-General
    General
    maths-

    A double decker bus can accommodate (u + ell) passengers, u in the upper deck and ell in the lower deck. The number of ways in which the (u + ell) passengers can be distributed in the two decks, if r (less or equal than ell) particular passengers refuse to go in the upper deck and S(less or equal thanu) refuse to sit in the lower deck, is -

    A double decker bus can accommodate (u + ell) passengers, u in the upper deck and ell in the lower deck. The number of ways in which the (u + ell) passengers can be distributed in the two decks, if r (less or equal than ell) particular passengers refuse to go in the upper deck and S(less or equal thanu) refuse to sit in the lower deck, is -

    maths-General
    General
    maths-

    Domain of f(x) = log10(log10(1 + x3)) is -

    Domain of f(x) = log10(log10(1 + x3)) is -

    maths-General
    parallel
    General
    chemistry-

    The correct orders about compounds I and II are:
    i) 
    ii) 

    The correct orders about compounds I and II are:
    i) 
    ii) 

    chemistry-General
    General
    chemistry-

    Which of the following is correct method for separating a mixture of following compounds?

    Which of the following is correct method for separating a mixture of following compounds?

    chemistry-General
    General
    chemistry-

    The order in which the reagent must be used to separate the compound I - IV is:

    The order in which the reagent must be used to separate the compound I - IV is:

    chemistry-General
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.