Elitmus Exam Numerical Ability Quadratic Equations

How many values of C in equation x^2-5x+c results in rational roots which are integers.?

a.1
b.3
c.6
d.Infinte

Approach..??

Read Solution (Total 4)

Elitmus Other Question

Find the number of ways you can fill a 3*3 grid ( wit h4 corners defined as a,b,c,d) if you have 3 white marbles and 6 black marbles

a.9c3
b.6c3
c.9c3+6c3
d.9c3+6c3/3!

Approach please...????
If 1/a+1/b+1/c=1/(a+b+c) where a+b+c not equals=0, abc not equals=0, what is the value of (a+b) (b+c) (A+c)...??

a. Equals 0
b.Greater than 0
c.Less than 0
d. Can't be determined