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HCL aptitude placement paper.

Hi Everyone, 

HCL conducted a walk in recruitment test some days back. I also participated in it along with 3 of my frineds. One of my friends actually made it through. Here are some of the quantitative aptitude questions that were there in the paper. They weren't very tough but somehow I could not make through for the lack of preparation. May be they will help some of you out there. 

How much pure alcohol should we add to 12 gallons of 20% acid solution to obtain a solution that is 80%? 
a) 3 gallons b) 6 gallons c) 8 gallons d) 9 gallons

The difference between the place value and face value of 9 in the 63894531 is:
a) 89981 b) 89991 c) 88999 d) 89999

Find the H.C.F. of 2/3, 3/9, 16/81 and 10/27.
a) 2/81 b) 80/3 c) 2/67 d) 3/19

The least number of 4 digits which is perfect square is:
a) 1100 b) 1200 c) 1024 d) None 

Which pair of numbers is different from the rest?
a.) (5, 15) b.) (6, 24) c.) (7, 49) d.) (9, 63)

X is twice as good workman as Y and together they finish the piece of work in 28 days. The number of days taken by X alone to finish the same work is
a) 42 days b) 36 days c) 25 days d) 24 days

2, 5, 7, 12, 15, 17, 22, ‘?’
a.) 39 b.) 26 c.) 27 d.) 28 e.) 24

20 men handshake with each other without repetition. What is the total number of handshakes made?
a) 190 b) 210 c) 150 d) 250

A game is played between 2 players and one player is declared as winner. All the winners from first round play in second round. All the winners from second round play in third round and so on. If 8 rounds are played to declare only one player as winner, how many players played the first round?
a) 256 b) 512 c) 64 d) 128


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