A can fill the tank in 7.5 min, B can do that in 5 min and a waste pipe can empty 14 liters/min. All 3 pipes working together can empty it in 1 hours. Find the capacity of the tank?
PRACTICE QUESTION 1 Equation x^2+qx+p=0 has real roots.find no. Of solutions pairs(p,q) where p,q are positive integers less than 5...
question9-if roots of equation x^4-8x^3+bx^2+cx+16=0 are positive 1) b=c=8 2) b=-20 c=-24 3) b=2 c=16 d) nota
No of zeroes in N=7*14*21*...*777?
remainder when (94^101^97)/97. please mention the approach
3)If f(x) = x^5 − x^4 − x^2 − x, and a, b, c are the roots of the cubic equation x^3 − x^2 − 1 = 0, then what is the sum of f(a), f(b) and f(c) ?
OPTIONS
1) 0
2) 3
3) 1
4) −1
5) −3
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DOUBT 2)If a, b, c, d and e are the five positive roots of the equation x^5 − 5x^4 + kx^3 + mx^2 + nx − 1 = 0, what is the product of k, m and n?
OPTIONS
1) More than 77
2) Less than −457
3) 0
4) Multiple of 7
5) Cannot be determined
4)If 2a + t, b, 2c + t are in geometric progression and the equation ax2 + bx + c = 0 has repeated roots. How many values 't' can take?
(A) 0
(B) 1
(C) 2
(D) 3
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Can anybody explain me this question-
10))50 persons are seated in a row, each assigned a number from 1 to 50 corresponding to his seating position. Every time, a count is made on the seats, and any person sitting on a seat corresponding to a prime number is removed and the seat numbers are rearranged beginning with one. This procedure is repeated until only 3 persons are left.What is the original seat number corresponding to the 3rd person
[DOUBT]13))Let r be a root of x^2 +5x+7 = 0. Compute (r −1)(r +2)(r +6)(r +3)
a) 0 b) 6 c) -6 d) 13 e) -13
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How many zeroes are there at the end of 25!+26!+27!+28!+29!+30!?
f(x) = 1/(x-1)(x-2) , and g(x) = 1/x^2
Is f(g(x)) continuous at x=0 ?
@scrabbler need your help. From the graph it doesn't seem to be discontinuous. But OA says it is discontinuous.
Puys! Pls help me out! How to interpret this DI.
m.imgur.com/fWBBGDn
Ques no. 31 anyone ?
## request for quant thread for 2016 ##
A request to the seniors here for making of thread for quant 16 , as most of the exams are over and the newbies , repeaters, fighters etc can all join and continue the legacy of quant!!!
Q23...?
Find the number of triplets X,Y,Z non-negative integers. If 6x^2 - 5y^2 - 7xy + 2xz + 8x + yz + 4y = 30 .?
Given N = 35 x 36 x 37 .......... x 67, what is the remainder left when N is divided by 289?
What is the smallest positive integer r such that there exist integers A₁, A₂, ..., Aᵣ with A₁^3 + A₂^3 + ... + Aᵣ^3 = 2011^2011