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SAURABH SHARMA
SAURABH SHARMA
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SAURABH SHARMA

Studied 12th at DDUSBV
Frontend and backend developer at Mystral
Live in India, Uttar Pradesh
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Have experience in teaching for 2 years. M. tech in computer science. currently ...
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11 Aug 2021 09:44 AM study24x7 study24x7
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10 May 2021 10:50 AM study24x7 study24x7

There are exactly one thousand boxes, numbered from 1-1000, as well as one thousand persons also numbered from 1-1000. All have to open or close the box as the following instructions

Person #1: Go to every box and open it. Person #2: Go to every second box and close it.
person #3: Go to every third box. If it is closed, open it, and if it is open, close it.
person #4: Go to every fourth box. If it is closed, open it, and if it is open, close it.This goes on until person #1000 is finished.


After 1000th person finished his turn. What is the number of opened boxes.

A

28

B

29

C

30

D

31

E

32

F

33

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  • MAHESHWARI MUKUL
  • Solve kese hoga?
    10 May 2021 10:50 AM study24x7 study24x7

    There are exactly one thousand boxes, numbered from 1-1000, as well as one thousand persons also numbered from 1-1000. All have to open or close the box as the following instructions

    Person #1: Go to every box and open it. Person #2: Go to every second box and close it.
    person #3: Go to every third box. If it is closed, open it, and if it is open, close it.
    person #4: Go to every fourth box. If it is closed, open it, and if it is open, close it.This goes on until person #1000 is finished.


    After 1000th person finished his turn. What is the number of opened boxes.

    A

    28

    B

    29

    C

    30

    D

    31

    E

    32

    F

    33

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    05 May 2021 06:24 PM study24x7 study24x7
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    27 Apr 2021 03:24 PM study24x7 study24x7
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    27 Mar 2021 10:12 AM study24x7 study24x7

    A

    140 cm

    B

    150 cm

    C

    160 cm

    D

    170 cm

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    22 Mar 2021 03:26 PM study24x7 study24x7
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    26 Jan 2021 09:34 AM study24x7 study24x7
    Happy Rebublic day. Watch REPUBLIC day celebrations live. https://youtu.be/qbwXmZb3QKk
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    18 Nov 2020 04:28 PM study24x7 study24x7

    The base of transistor is doped __________

    A

    Moderately

    B

    Heavyly

    C

    Lightly

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    18 Nov 2020 04:08 PM study24x7 study24x7

    A transistor has _______ junctions

    A

    3 pn

    B

    2 pn

    C

    1 pn

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