Latest TCS Aptitude Question SOLUTION: I’m interested in playing with marbles, In the first round I lost half of the marbles with which I started to play, in the second round I won 11 times of which I lost in first ro

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(#M40119582) TCS Category question Keep an EYE

I’m interested in playing with marbles, In the first round I lost half of the marbles with which I started to play, in the second round I won 11 times of which I lost in first round and after the third round I won 9 more marbles. Now I have 21 marbles with me, with how many marbles did I started to play?
a. 2
b. 4
c. 11
d. 12

Asked In TCS rajendra prasad (9 years ago)

Unsolved Read Solution (4)

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Read Solution (4) :

Surit Datta  (9 years ago)

Let at first i have x number of marbles.
i lost half,
so now i have x/2 numbers of marbles.
now in the second round i won 11 times of which i lost,
so now i have x/2 + 11*x/2 number of marbles.
in the third round i won 9 more.
so at present i have x/2 + 11*x/2 + 9
which you equal to 21
solving this we get,
x = 2
so at first i had 2 numbers of marbles.

Is this solution Helpfull? Yes (5) | No   

SOURAV SAHA  (9 years ago)

at 1st x
the after 1st round remains =x/2
won 11x/2
then total marbles after 2nd round will be=11x/2+x/2=6x
6x+9=21 or x=2

Is this solution Helpfull? Yes (2) | No   

ABHISHEK DOKANIA  (9 years ago)

let the answer be 2
then after 1st I lost half i.e. 1 marble left
in 2nd round i won 11 times i lost in 1st round i.e. 11 so total 12(11+1) after 2nd round
In 3rd round i won 9 more so now total will be (12+9) equals 21
which is same as given
so a is correct

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Monojit Saha  (8 years ago)

we can solve the question using option
if I consider no of marbles is 2 then
at first he looses 1 marble leaving 1 marble
then he won 11 times i.e 11
so total 12
nxt he won 9 more so
Ans is : 21

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