Latest Elitmus Aptitude Question SOLUTION: find the number of possible integral value of X. for which this(3*X+7)^2/(X+4) give the integer value. options: a. 2 b. 4 c. 6 d. infinte

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(#M40018110) ELITMUS question quant Keep an EYE

find the number of possible integral value of X.
for which this(3*X+7)^2/(X+4) give the integer value.
options:
a. 2 b. 4 c. 6 d. infinte

Asked In Elitmus Deepak kumar Dubey (11 years ago)

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@bh!  (11 years ago)

after dividing the no. we get 25/X+4 as remainder.
possible no: -29,21,-9,-5,-3,1

Is this solution Helpfull? Yes (27) | No (3)  

Satyaranjan  (11 years ago)

(3X+7)^2/(X+4)=(3X+7)*[(3X+7)/(X+4)]=I*II
Part I will be integer for every integral value of X,then consider Part II
we can modify it as (3X+12-5)/(X+4)=[(3X+12)/(X+4)]-[5/(X+4)]=3-[5/(X+4)]
so 5/(X+4) would be an integer for X value 1 and -9.

So the answer will be 2

Is this solution Helpfull? Yes (22) | No (6)  

Raman  (11 years ago)

I got 3 values of x.
x= -3,1,21 for positive integer values of (3*X+7)^2/(X+4).

Is this solution Helpfull? Yes (4) | No (5)  

Raman  (11 years ago)

I got 3 values of x.
x= -5,1,21 for positive integer values of (3*X+7)^2/(X+4).

Is this solution Helpfull? Yes (2) | No (3)  

shweta sharma  (11 years ago)

wht is d rght answer?

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farjana sayyed  (10 years ago)

@bhi,,

how did you get that abhi?

could you explain me some what clear?

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