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(#M40010600) INFOSYS QUESTION Keep an EYE

The puzzle is Nine IIT students were sitting in a classroom. Their professor wanted them to test. Next day the professor told all of his 9 students that he has 9 hats, The hats either red or black color. He also added that he has at least one hat with red color and the no. of black hats is greater than the no. of red hats. The professor keeps those hats on their heads and ask them tell me how many red and black hats the professor have? Obviously students can not talk to each other or no written communication, or looking into each other eyes; no such stupid options and no tricks.
Professor goes out and comes back after 20 minutes but nobody was able to answer the question. So he gave them 10 more minuets but the result was the same. So he decides to give them final 5 minutes. When he comes everybody was able to answer him correctly.

So what is the answer? and why?

Asked In Infosys alluri udaykumar (13 years ago)

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(#M40000841) TCS QUESTION tcs recent puzzle Keep an EYE

One grand father has 3 grand children two of the age difference is 3.Eldest child age is 3 times the youngest childs age and the eldest child age is two year more than the sum of other two children. Find what is the age of the elders child?
a)18 b)22 c)30 d)10

Solution

let the age of eldest child is E , that of elder child is M and that of youngest child is Y, then according to the given conditions
E = 3Y ....(1)
E = 2 + M + Y ....(2)
now third condition is somewhat complicated,
according to this condition 'two of the age difference is 3' so three cases will arise 1) E - M = 3, ......(3)
2) M - Y = 3, ......(4)
3) E - Y = 3, ......(5)
if we take first of the 3 conditions then on solving (1), (2) and (3) we will get E = 3, M = 0, Y = 1 which is wrong
now on solving (1), (2) and (4) we will get E = 15, M = 8, Y = 5
similarly on solving (1), (2) and (5) we will get E = 4.5, M = 1, Y = 1.5
only E = 15, M = 8, Y = 5 is correct so age of elder child is 8 years

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Asked In TCS Yashar (14 years ago)

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(#M40009519) CAT QUESTION Keep an EYE

If m and n are whole numbers such that m^n = 121, the value of (m - 1)^(n + 1) is

Asked In CAT (13 years ago)

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(#M40003939) 3I-INFOTECH QUESTION 3i-infotech latest puzzle Keep an EYE

Choose an appropriate antonym for the word deliberate.

a) unintended
b) targeted
c) focussed

Answer: a) Unintended

Asked In 3i-Infotech (14 years ago)

Solved Sanjana Patnaik Read Solution (2)

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(#M40003940) 3I-INFOTECH QUESTION 3i-infotech latest puzzle Keep an EYE

Choose the antonym for Sorrow.

a) Joy
b) empathy
c) sympathy

Answer: a) Joy

Asked In 3i-Infotech (14 years ago)

Solved aruna Read Solution (2)

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(#M40039675) TCS QUESTION Keep an EYE

in how many ways can a letters of word "BALLOON" is arranged so that two Ls do not come together

Asked In TCS vivek gupta (11 years ago)

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(#M40000038) INFOSYS QUESTION Keep an EYE

From a vessel on the first day, 1/3rd of the liquid evaporates. On the second day 3/4th of the remaining liquid evaporates. what fraction of the volume is present at the end of the 2 day

Asked In Infosys (16 years ago)

Solved Wafa Read Solution (3)

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(#M40031921) INFOSYS QUESTION Apti Keep an EYE

Q. Number of 4digitd fomred unsing 1 2 3 4 5 5 6 6 .?

Asked In Infosys N Arun Singh (11 years ago)

Solved adithya Read Solution (13)

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(#M40032202) INFOSYS QUESTION Aptitude Keep an EYE

Q. There are five same model cars parked in the same direction in parking. If 3 cars are red, 1 is black and 1 is green, in how many ways they can be arranged in the parking?

Asked In Infosys GEETHA KALYANI (11 years ago)

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(#M40010015) SELF QUESTION Keep an EYE

The longest side of a triangle is 3 times the shortest side and the third side is 2 cm shorter than the longest side. If the perimeter of the triangle is at least 61 cm,What is the minimum length of the shortest side?

Devendra Marghade (13 years ago)

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