official quant thread for cat08

[naga25french]

Originally Posted by Raja_The_Ruler

Hi All,

Answer is 19, range -9 to 9 are covered. Can you explain your answer. Bcoz according to me range should be -18 to 18

if u see ma approach

i have written two eqns..


numbers in (-18 ,-10) and (10,18 ) satisfy only one eqn... jus check out..


hope u understand.. anymore clarifications?

[Raja_The_Ruler]

Originally Posted by naga25french

if u see ma approach

i have written two eqns..


numbers in (-18 ,-10) and (10,18 ) satisfy only one eqn... jus check out..


hope u understand.. anymore clarifications?

Yep! I got it.

[deep@k]

Originally Posted by Raja_The_Ruler

Hi All,

I am unable to solve the below question, please try this and give me you answer with explanation, if you are done

Q. How many integral value satisfy the equation |x-18|+|x-9|+|x+9|+|x+18| = 54

I think answer is 19 it satisfies all the value between range (-9,9)....

[celina_mba]

can any body tell me a good tutorial for number theory???

[Andrewgoel]

Originally Posted by convivial

ok frnds..here's first one 4m me.....an easy one just 2 start up

1.find the number of negative integers which satisfy the equation
mod(x+1/x)+mod(x+1)=(x+1)^2/mod(x)
a)0
b)1
c)2
d)3

I think answer is option a) that is 0

[Fuzon]

Originally Posted by convivial
ok frnds..here's first one 4m me.....an easy one just 2 start up

1.find the number of negative integers which satisfy the equation
mod(x+1/x)+mod(x+1)=(x+1)^2/mod(x)
a)0
b)1
c)2
d)3

My answer option is a. 0.... is it rite ?

[vaibhav2cool]

Originally Posted by Fuzon

My answer option is a. 0.... is it rite ?

nopes the answer for this one is 1. and the value of the negative number is -1

[selebratinglife]

Originally Posted by vaibhav2cool

nopes the answer for this one is 1. and the value of the negative number is -1

For -1, LHS=2, RHS=0...

[vaibhav2cool]

Originally Posted by selebratinglife

For -1, LHS=2, RHS=0...

ok yeah... i took it as mod((x+1)/x) as the first term of lhs this thing has caused confusion earlier also regarding this ques..

[vaibhav2cool]

please solve this problem with exlpanation: # Find the remainder when x^80+2x^40+9x^20+3x^3+2x^2+1 is devided by x^2-1.