self Maths Puzzle


If x3−6x2+px+q is exactly divisible by x2−3x+2, then:

A.

p+q > 0 and pq > 0

B.

p+q > 0 and pq < 0

C.

p+q < 0 and pq < 0

D.

p+q < 0 and pq > 0

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self Other Question


When the index of an exponential expression with a positive base is doubled, then the expression increases by 700%. If one of the values that the base cannot have is X which of the following is not a possible value of P?
The mean salary in ICM ltd. was Rs 1500, and the standard deviation was Rs 400. A year later each employee got a Rs 100 raise. After another year each employee's salary (including the above mentioned raise) was increased by 20%. The standard deviation of the current salary is?