INFOSYS PLACEMENT PAPERS ----- Placement Paper 15
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> INFOSYS
>
> LOGICAL THINKING TEST
> ---------------------
>
Time : 1 hour
>
Total Marks : 50
>
> ALL QUESTIONS DO NOT CARRY EQUAL MARKS
>
> INSTRUCTIONS
>
> * Please do not write/mark on the question paper.
>
> * Read the questions carefully. Work your answers
carefully
> and as
> rapidly as possible.
>
> * Do not spend too much time on questions that
seem difficult
> for you.
> If time permits go back to the ones you have
left out.
>
> * Answer sheets have been provided to you
separately. Use the
> first
> sheet to write your answers and use the
remaining sheets for
> the
> detailed working.
>
> * On completion, please put your answer sheet
along with the
> working
> sheets, inside the question paper and hand them
back to us.
>
> * There is no negative marking.
>
>
> Do not turn the page until you are told to do so.
>
>
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>
>
>
1.
2 Marks
>
> When Arthur is as old as his father Hailey is now,
he shall be
> 5 times
> as old as his son Clarke is now. By then, Clarke
will be 8
> times older
> than Arthur is now. The combined ages of Hailey and
Arthur are
> 100
> years. How old is Clarke ?
>
>
2.
3 Marks
>
> I have one orange glass containing orange juice and
another
> white glass
> containing apple juice. I take 50 ml of orange
juice and mix it
> with
> apple juice in the white glass. Then I take 50 ml
of this
> mixture and
> transfer it back to the orange glass.
> If you compare amount of apple juice in the orange
glass and
> amount of
> orange juice in the white glass which is more than
the other
> and by
> how much ?
>
>
3.
3 Marks
>
> The seven digits in this subtraction problem are
> 0,1,2,3,4,5 and 6.
> Each letter represents the same digit whenever it
occurs.
>
>
> D A D C B
>
> E B E G
>
> --------------------
>
> B F E G
>
> --------------------
>
> What digit is represented by each letter ?
>
>
>
4.
4 Marks
>
> The Jones have named their four boys after
favourite
> relatives; their
> friends, the Smiths, have done the same thing with
their three
> boys.
> One of the families has twin boys. From the
following clues,
> can you
> determine the families of all seven children and
their ages ?
>
> i) Valantine is 4 years older than his twin
brothers.
> ii) Winston, who is 8, and Benedict are not
brothers. They are
> each
> named after a grandfather.
> iii) Briscoe is two years younger than his brother
Hamilton,
> But three
> years older than Dewey.
> iv) Decatur is 10 years old.
> v) Benedict is 3 years younger than Valentine;
they are not
> related.
> vi) The twins are named for uncles.
>
>
>
5.
4 Marks
>
> Motorboat A leaves shore P as B leaves Q; they
move
> across the lake at
> a constant speed. They meet first time 600 yards
from P. Each
> returns
> from the opposite shore without halting, and they
meet 200
> yards from
> Q. How long is the lake ?
>
>
>
6.
4 Marks
>
> Fanta, Pepsi and Citra often eat dinner out.
>
> a) Each orders either coffee or tea after dinner.
> b) If Fanta orders coffee, then Pepsi orders the
drink that
> Citra orders.
> c) If Pepsi orders coffee, then Fanta orders the
drink that
> Citra does
> not order.
> d) If Citra orders tea, then Fanta orders the drink
that Pepsi
> orders.
>
> Which person/persons always orders the same drink
after dinner
> ?
>
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7.
6 Marks
>
> On the Island of imperfection there is a special
road,
> Logic Lane, on
> which the houses are usually reserved for the more
mathematical
> inhabitants.
>
> Add, Divide and Even live in three different houses
on this
> road (which
> has houses numbered from 1-50). One of them is a
member of the
> Pukka Tribe,
> who always tell the truth; another is a member of
the Wotta
> Tribe, who never
> tell the truth; and the third is a member of the
Shalla Tribe,
> who make
> statements which are alternately true and false, or
false and
> true.
>
> They make statements as follows :
>
> ADD : 1 The number of my house is greater than
that of
> Divide's.
> 2 My number is divisible by 4.
> 3 Even's number differs by 13 from that
of one of the
> others.
>
> DIVIDE : 1 Add's number is divisible by 12.
> 2 My number is 37.
> 3 Even's number is even.
>
> EVEN : 1 No one's number is divisible by 10.
> 2 My number is 30.
> 3 Add's number is divisible by 3.
>
> Find to which tribe each of them belongs, and the
number of
> each of
> their houses.
>
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>
8.
8 Marks
>
>
> The names of the inhabitants of Walkie Talkie
Land sound
> strange to the
> visitors, and they find it difficult to pronounce
them, due to
> their
> length and a few vowel sounds they contain. The
Walkie Talkie
> guide is
> discussing the names of four inhabitants - A,B,C
and D. Their
> names
> each contain upto eight syllables, although none of
the four
> names
> contain the same number. Two of the names contain
no vowel
> sounds; one
> contains one vowel sound; and one contains two
vowel sounds.
>
> From the Guide's statements below, determine the
number of
> syllables
> and vowel sounds in each of the four Walkie Talkie
names :
>
> i) The one whose name contains two vowel sounds is
not A.
> ii) C's name does not contain more than one vowel
sound or
> fewer than
> seven syllables.
> iii)The name with seven syllables does not contain
exactly one
> vowel
> sound.
> iv) B and C do not have names with the same number
of vowel
> sounds.
> v) Neither the name with five syllables nor the
name with
> seven syllables
> contains more than one vowel sound.
> vi) Neither the name with six syllables, nor the
B's name,
> contains
> two vowel sounds.
>
>
>
9.
8 Marks
>
>
> Multiplication and Division.
>
>
> (1) - - - - - (a) (2) _ _ .
_ (d)
> ________________
> - - - (b) - - -) - - - - - . 0
> _________________ - - -
> _______________
> - - - - -
> - - - - - - - - -
> ___________________ - - -
>
_______________
> - - - - - - - (c)
> - - -
> - - -
> ========
>
> (1) and (2) represent the same two numbers - in
one case
> multiplied
> 9together, in other case divided.
>
> Given that there are no 3's. find the missing
digits indicated
> as
> (a), (b), (c) and (d) above ?
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>
>
10.
8 Marks
>
> Two identical twins have a very unusual
characteristic.
> One tells
> nothing but lies on Mondays, Wednesdays and
Fridays, and tells
> nothing
> but the truth all other days. The other tells
nothing but lies
> on
> Tuesdays, Thursdays and Saturdays, and tells
nothing but the
> truth
> all other days. On Sundays both children speak the
truth.
>
> 1) Which of the following statements can be deduced
from the
> information presented ?
>
> i) If it is Sunday, the twins will both say so.
> ii) If it is not Sunday,one twin will give the
correct day
> and
> the other will lie about everything.
> iii)On any given day, only one twin will give
his correct
> name.
>
> a) i only
> b) i and ii only
> c) i and iii only
> d) ii and iii only
> e) i,ii and iii
>
> 2) According to the information presented, which of
the
> following
> conversations will be impossible.
>
> a) Twin A : "Today you are a lier"
> Twin B : "You are telling the truth"
>
> b) Twin A : "Today you are a lier"
> Twin B : "Today I am a truthteller"
>
> c) Twin A : "Tommorow I shall be a lier"
> Twin B : "That's correct"
>
> d) Twin A : "Tommorow you will be a lier"
> Twin B : "Today you are a truthteller"
>
> e) Twin A : "Yesterday we were both
truthtellers"
> Twin B : "You are lying"
>
> 3) Assume that the twins followed a different set
of
> rules, so that on
> a given day both told only the truth while next
day
> both only lied,
> alternating days of truth telling and lying.
Under these
> rules,which
> of the following conversations would be possible ?
>
> a) Twin A : "Today you are a lier"
> Twin B : "That is correct"
>
> b) Twin A : "Today you are a lier"
> Twin B : "That is not so"
>
> c) Twin A : "Tommorow we will be liers"
> Twin B : "Yesterday we were truthtellers"
>
> d) Twin A : "Tommorow we will be liers"
> Twin B : "You are 1 year older than I am"
>
> e) Twin A : "We always tell the truth"
> Twin B : "We some times tell the truth"
>
> 4) If the twins are heard saying the following on
the same
> day, which
> choice presents a correct statement ?
>
> Twin A : "It is Sunday Today"
> Twin B : "Yesterday was Sunday"
> Twin A : "it is summer season now"
>
> a) it is a summer sunday
> b) it is a summer monday
> c) it is Monday but not summer
> d) it is Sunday but not summer
> e) it is impossible to determine whether it is
Sunday or
> Monday.
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