1. A boy got bored of the class and started walking on
    a hall which contained 1024 lockers in a row. He first
    opened locker 1 and alternatively left one and opened
    one from thereon. When he reached the end he turned
    back and opened the first closed locker and from
    thereon continued what he did previously. He did this
    back and fro method till he opened the last locker.

    What is the number of the last locker he opened?
  2. Two mathematicians met after 27 years in their
    college. This was their conversation.

    First: How are you doing?
    Second: Fine I got married and have three daughters.
    First: Fine. I also got married 2 years after the
    college. How old are your daughters?
    Second: Well, Product of their ages is 72 and their
    sum is equal to that house number (It was not
    First: Wait, I am still counting.
    Second: Sorry, youngest of them has just started
    First: Is it! Youngest of mine is also of the same

    How old are the three daughters?
  3. In the 2nd world war Japan’s war ship named J was
    followed by the USA war ship U which is traveling at
    100kmph. By the time U was beside J and ready to
    launch the torpedo, the place was surrounded by fog
    and the army-general in U could not see anything.
    Taking this as a chance J changed in direction at an
    angle. After 6min the general in U realized it and
    informed the helicopter over it to find J. After 3
    minutes the helicopter replied that J turned at an
    angle 45 degrees and was 5km away from U at the time
    when the general asked for it. The intelligent general
    quickly turned U and successfully caught J.

    How much time “U” would have taken to catch “J”?
  4. There is a temple on the top of the hill of height
    1000mtrs.Coconuts at the base of the hill are sold at
    5/- each and at the top of the hill at 50/- each. One
    intelligent businessman thought of buying coconuts at
    the base and selling them at the top. For that he
    appointed 2 people who can carry only 1000 coconuts at
    a time and takes 1 coconut for every mtr of walk.

    Can he succeed in his plan. If yes how much profit he
    earns for a rupee of investment?
  5. There is bag containing balls of three colors-Red,
    Green and Yellow and there are three color blind
    people A, B and C.
    For A Red is invisible and every other color
    appears Gray.
    For B Green is invisible and every other color
    appears Gray.
    For A Yellow is invisible and every other color
    appears Gray.

    They were shown the box and when asked the question
    what can see their replies were
    A: I can see two balls.
    B: I can see two balls.
    C: I can see two balls.
    How many balls were there in the box and of what
  6. There is a farm which contains super hens which r
    genetically made to lay eggs of double size than the
    normal ones. But as genetic engg. is not well
    understood there is only 50-50% chance of a super hen
    laying large egg.
    The farm is such tht it keeps the hen as long as
    it lays large eggs and removes the hen out of the farm
    as soon as it lays one normal egg.
    The farm followed the same process for one year
    and counted all the eggs laid by all the super hens.
    At the end of the year the ratio of large eggs to the
    normal ones is?
  7. There are 8 stamps, 4 Red and 4 Green. There are
    three logicians also. One moderator sticks thow stamps
    each on the forhead of each logician such that each of
    them can see all the stamps except those on his
    forhead and the two in moderator's pocket. Then the
    moderator asked each whether he knows the colors of
    the stamps he wears? Then the answeres were:
    A: "No" B: "No" C: "No"
    A: "No" B: "Yes"
    What were the colours of the stamps that B wears?
  8. There's a camel living in a desert. There is a
    market 1000 miles away. The camel has 3000 dates for
    sale. It has to take the date to the market. But for
    that hte camel eats one date per mile. How many dates
    the camel can trade?
  9. There are following denominations of money: 1, 2,
    5, 10, 20, 50, and 100 paise. Alex has as twice mony
    as David, who has as twice as Bindya, who again has as
    twice money as Charles. Each has two coins in hand.
    Which coins Bindya has?
  10. There are Brown and Black cows. In five days four
    black cows and 3 brown cows give as mush as milk that
    four brown cows and 5 black cows give in four days. If
    the black cow gives 10 litres of milk per day, how
    many liters of milk the Brown cow will give in one
    day?(Numbers are not certain)
  11. One guy (some name) has Rs. 100/- in hand. He has
    to buy 100 balls. One football costs Rs. 15/, One
    Cricket ball costs Re. 1/- and one table tennis ball
    costs Rs. 0.25 He spend the whole Rs. 100/- to buy the
    balls. How many of each balls he bought?
  12. U need 2 kill a dragon with 3 heads & 3 tails. u
    have a magic sword dat can cut 1 head, 2 heads, 1
    tail, or 2 tails in 1 swing.
    if 1 head is cut -> a new head grows
    if 1 tail is cut -> 2 tails grow
    if 2 tails r cut -> 1 head grows
    if 2 heads r chopped -> nothing grows. What is d min.
    num of swings 2 b made?
  13. Slow train runs b/w Blore & Mumbai, up as well as
    down. It starts at 10:00pm everyday & reaches
    destination by 11:30pm after 3 days. If u travel by
    Slow train, how many such trains will u encounter
    during journey?
  14. A num of birds, black & white, r sitting on thhe
    tele wire. There is at least 1 bir of each color, also
    whenevr 2 birds are seperated by 4 or 7 other boirds
    of any color, both birds r of same color. Wot is the
    max. num of birds dat can b seated in this fashion?
  15. 5 ppl, A, B, C, D, E are supposed 2 cover a certain
    distance from their car to a house. There is only 1
    umbrela dat can b shared by 2 ppl at a time.
    It takes 1min for A 2 cover the dist, B->2 min,
    C->5min, D->10min, E->15min.
    Wot is d quickest poss time 4 the entire grp 2 get
    into the house?
  16. Mr.X belongs 2 a grp of 8 ppl including himself. In
    d meeting, nobody shakes hands with the same person
    more than once but everyone shakes hands with at least
    1 person.
    After the meeting is over, Mr.X realizes dat all the
    other ppl in the party had shook a diff num of hands.
    How many hands did Mr.X shake?
  17. Old Man Wrinkle
    Man Wrinkle spent one-fourth of his life as a boy,
    one-eighth as a youth, and one-half as an active man.
    If Man Wrinkle spent 8 years as an old man, then how
    many years did he spend as an active man?
  18. A farmer has C chickens.A sack of feed comes for 9
    days.As the feed cost is increasing the
    farmer sells some chickens and retains 12 chicken.If
    he reduces the feed quantity by 10% .Then
    he observesthat the feed comes for 30 days.What is C?
  19. The Carpenter and the Nails
    A 31" x 31" square metal plate needs to be fixed by a
    carpenter on to a wooden board. The carpenter uses
    nails all along the edges of the square such that
    there are 32 nails on each side of the square. Each
    nail is at the same distance from the neighboring
    nails. How many nails does the carpenter use?
  20. Vacation time
    It was vacation time, and so I decided to visit my
    cousin's home. What a grand time we had! In the
    mornings, we both would go for a jog. The evenings
    were spent on the tennis court. Tiring as these
    activities were, we could manage only one per day,
    i.e., either we went for a jog or played tennis each
    day. There were days when we felt lazy and stayed home
    all day long.
    Now, there were 12 mornings when we did nothing, 18
    evenings when we stayed at home, and a total of 14
    days when we jogged or played tennis. For how many
    days did I stay at my cousin's place?
  21. Monkeys and bananas:
    Suppose 8 monkeys take 8 minutes to eat 8 bananas.
    (a) How many minutes would it take 3 monkeys to eat 3
    bananas?(b) How many monkeys would it take to eat 48 bananas
    in 48 minutes
  22. Glenn and Jason each have a collection of cricket
    balls. Glenn said that if Jason would give him 2 of
    his balls they would have an equal number; but, if
    Glenn would give Jason 2 of his balls, Jason would
    have 2 times as many balls as Glenn. How many balls
    does Jason have?
  23. A set of football matches is to be organized in a
    "round-robin" fashion, i.e., every participating team
    plays a match against every other team once and only
    If 21 matches are totally played, how many teams
  24. Gold coins:
    A rich merchant had collected many gold coins. He did
    not want anybody to know about them. One day, his wife
    asked, "How many gold coins do we have?"
    After pausing a moment, he replied, "Well! If I divide
    the coins into two unequal numbers, then 37 times the
    difference between the two numbers equals the
    difference between the squares of the two numbers."
    The wife looked puzzled. Can you help the merchant's
    wife by finding out how many gold