(a, b), (b, c) and (c, a) are the roots of x2 – 2px + 3 = 0, x2 – 2qx + 5 = 0 and x2 – 2rx + 15 = 0 respectively, where a, b and c are positive real numbers. Find the value of p + q + r. (a) 6 (b) –9 (c) 9 (d) 18 Please post detailed solution
Solve this one.
Two cities X and Y lie on a straight line. Two men P and Q left simultaneously for Y and X respectively.P reaches Y and moves towards X. On reaching X, again he turns around and moves towards Y. This kind of movement continues indefinitely. Q also travels in a similar manner. The distance between X and Y is 1000m and the ratio of the speeds of P and Q is 3:2. Find the distance travelled by P when he meets Q for the 4th time ?
oa-4200m
In how many ways can 12 persons seat themselves at 3 diffrent round tables, 4 at each?
- (12!×3!^3)/4!^3
- 12!/(4!)^3
- 12!
- None
0 voters
On using Alligation i get final ratio as 5:3 but why the answer is a) ?
I am seven times as old as you were when i was as old as you are, said a man to his son. Find their present ages if sum if their ages is 110. Concept??
no. of zeroes immediately following the decimal point in (2/3)^432
log2=0.301 and log3=0.477
need to confirm the answer
it is 75 or 76 ?
If log a(base x) = log y (base y ),where a is a natural no. and both x and y are greater than a, then which of the following is necessarily true ?
1- x is always equal to y
2- x is never equal to y
3- x need not be equal to y
oa- option 3
please give me an example which says x need not be equal to y.
Please tell me the approach
The number of ways of factorising 91,000 into two factors , m and n , such that m>1,n>1 and gcd (m,n)=1. ( Approach pls)
- None
- 15
- 7
- 32
0 voters
Four boys a, b, c, d and their respective girlfriend e, f, g and h are to be seated around a rectangular table with 4 chairs on 2 sides each such that no couple sit exactly facing each other. The boys want to be seated on the same side, how many seating arrangements are possible?
- 288
- 216
- None
- 432
0 voters
Gautam decided to go to a temple only on first and the last day of a year. He continues to go to the
temple in this fashion till the time he finds that he has visited the temple atleast once on each of the
different days of a week. The minimum number of days required to achieve this is
(1) 1255 (2) 1462 (3) 1463 (4) 1827 (5) 1826
Pls solve this.
could anybody please explain why we have calculated T10 in first example and T11 in second?
Question 15 approach plz
Two persons start from the opposite ends of a 90km straight track and run to and fro between the two ends. The speed of first is 30m/s and speed of other is 125/6m/s. They continue their motion for 10 hours. How many times they pass each other ?
Q17 approach pls
Approach plz
Which is prime?
A.2^70+1
B.2^96+1
C.2^160+1
D.None of these
Remainder when 77777..... 56 digits divided by 19??
plz explain approach.