Elitmus
Exam
Numerical Ability
Log and Antilog
(n^2-5n-16)/n for how many values of n the expression remains integer
answer 5
Read Solution (Total 4)
-
- lavanya you did right but it says integer ( not only positive integer ) so answer should be 10
because you will have to taken negative integer also i.e -1,-2,-4,-8-16 . - 8 years agoHelpfull: Yes(22) No(0)
- (n^2-5n-16)/n
=n-5-(16/n)
=> for being n integer n has to divide 16 completely
=> factors of 16 would be the answer which are : 1,2,4,8,16
=> these 5 values are possible - 8 years agoHelpfull: Yes(4) No(8)
- zero is also an integer so the ans is 11 (-1,-2,-4,-8,-16,1,2,4,8,16 and 0)
- 4 years agoHelpfull: Yes(1) No(0)
- Wrong question nd correct one is
n is positive integer.
(4n^2 - 16n + 16 )/n . How many integral values of n are possible if the above equation results in an Integer.
- 8 years agoHelpfull: Yes(0) No(0)
Elitmus Other Question
total race distance 2100
A flight beat B flight by 420 when wind is in the race direction,it beats B by 300 when opposite.find the still fight speeds
17 Jan 2106 ::
1. x,y,z are three super prime numbers ( >100), and all three are multiplied. A super prime no if of the form where p+2, where p is a prime number.
Then there were options in which equations were given in terms of x,y&z , and it was asked which term is closest to x*y*z.
2. 5 Chocolates, namely A,B,C,D,E are to be distributed among 3 kids, in which each may receive any no of chocolates.
3. n is positive integer.
(4n^2 - 16n + 16 )/n . How many integral values of n are possible if the above equation results in an Integer.
4. x>y>1. What is the maximum value of log(base x)[route(x)/y] + log(base y)[route(y^2)/x] .
options : a.) 0 b.) 1 c.)1.5 d. dont remember.