Tuesday, June 8, 2010

Math Quiz (2)


If there are FIVE people in a room and each shakes hand exactly once with everyone else in the room, how many handshakes will there be?
(Hint: Act it out or draw a diagram to help you.)

22 comments:

  1. the answer is 25 people .
    because : there five persons here : 1 1 1 1 1
    5 5 5 5 5
    so 5*5=25
    so the answer should be 25 .

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  2. The answer is 2 handshakes because:there are 1 1 1 1 1 person.1*1=1 handshakes
    1*1=1 handshakes
    1 persons have no friend to
    handshake.
    so 1+1=2 handshakes.
    So the answer should be 2 handsakes.

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  3. The answer 2 was actully wrong,the answer is 10 handshakes because:lets,the five persons name are A,B,C,D and E.
    A handshakes with B,C,D and E=4
    B handshakes with c,D and E=3
    c handshakes with D and E=2
    D handshakes with E=1
    4+3+2+1+=10.So the answer should be 10,ten.

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  4. There are 5 people, 1 2 3 4 5.
    Person 1 shakes with 2 3 4 5 = 4 handshakes
    Person 2 shakes with 3 4 5 = 3 handshakes
    Person 3 shakes with 4 5 = 2 handshakes
    Person 4 shakes with 5 = 1 handshake
    Person 5 no need to shake with anyone because he/she has shake with everyone once.
    So, total number of handshakes: 4+3+2+1 = 10 Handshakes.

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  5. A PERSON- SHAKE WITH B C D E = 4 HANDSHAKES
    B PERSON- SHAKE WITH A C D E = 4 HANDSHAKES
    C PERSON- SHAKE WITH A B D E = 4 HANDSHAKES
    D PERSON- SHAKE WITH A B C E = 4 HANDSHAKES
    E PERSON- SHAKE WITH A B C D = 4 HANDSHAKES

    ANSWER: 5 x 4 = 20 HANDSHAKES

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  6. The answer is 20. Because each handshake is 5. So , my answer was 4 x 5 = 20 handshake.

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  7. The answer is 10.
    because:
    Person A shakes with Person B,C,D,E.
    Person B shakes with Person C,D,E.
    Person C shakes with Person D & E.
    Person D shakes with Person E.
    Person E does not handshake as he/she has shook with everyone once.

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  8. Kudos to those of you who got it right! The rest try harder!

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  9. 5 people
    myself, mum, dad, elder sister, grandma

    myself shakes mum's, dad's, elder sister's, grandma's hands = 4

    mum shakes dad's, elder sister's, grandma's hands = 3

    dad shakes elder sister's, grandma's hands = 2

    elder sister shakes grandma's hand = 1

    4+3+2+1 = 10

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  10. Person A = shakes hands with B, C, D and E (4 people)
    Person B = shakes hands with C, D and E (3 people
    Person C = shakes hands with D and E (2 people)
    Person D = shakes hands with E (1 person)
    4+3+2+1= 10 handshakes

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  11. It is best to act it out with 4 other people. It really help in yourunderstanding.

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  12. The answer is 10
    explanation:because each person shakes hands only once with everyone in the room.

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  13. The answer is 10.
    Explanation:because each person shakes hands only once with everyone in the room.

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  14. the anwer is 1o because each person shakes hands only once with everyone.

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  15. the anser is 4 people because it was myself,mother,father and brother

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  16. katherine said thisJuly 15, 2010 at 4:40 PM

    oh i know whats this it is abcdefgijklmnop!!!so i am katherine who said this
    thank u !!!!

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  17. the anser is 1o becuase each person shakes hands only once with everyone.

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  18. The answer is 5 people,because me,my mummy,my father,my granny and my elder sister.

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  19. answer is 10 shakehand.
    XD

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  20. the answer is 4 people .

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  21. The answer is 5 people,becaus me,my mummy,my father,my granny and my elder sister.

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  22. Fiorentia Chen QiqiJuly 15, 2010 at 4:53 PM

    the answer is 10
    because ,
    each person shakes hand with each other

    ReplyDelete