P and Q are two diametrically opposite points in a circle,A and B start simultaneously from P and Q at the speed of 20rounds per hr and 40rounds per hour respectively.C starts from Q at the speed of 10rounds per hr.if B and C move in clockwise direction and A move in anticlockwise direction ,find the time when all three of them are together for the third time anywhere on the track
Find remainder when 1x1!+ 2x2!+ 3x3!+.....10x10! + 2 is divided by 11!
a. 10
b. 0
c. 7
d. 1
OA don't know.
A container is full of milk. 6 litres of milk is taken out from it and, then, the container is filled with water. Next time 10 litres of the mixture is taken out and the container is filled with water such that the concentration of milk in the mixture becomes 0.75. What is the capacity of the container?
a. 54 litres b. 60 litres c. 72 litres d.24 litres e. None of these
The time taken by A to complete a work is 4 days more than A & B together to complete the work, and 5 days more than that taken by A&C together, If the efficiencies of B & C are in the ratio 2:3. then A alone can complete the work in ????
In a chess competition involving some boys and girls of a school, every student had to play exactly one game with every other student. It was found that in 45 games both the players were girls, and in 190 games both were boys. The number of games in which one player was a boy and the other was a girl is
(1) 200 (2) 216 (3) 235 (4) 256.Approach plzz
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value of sin12*sin48*sin54 ? All values are in degree
S = 1+1/2+1/6+1/12+1/36+1/72 ......infinity
Sum of all numbers not more than 126 which are not a factor of 126 .
In a triangle ABC, D is the midpoint of BC and E is the midpoint of AD, BF passes through E. What is the ratio of AF:FC?
a. 1:1
b. 1:2
c. 1:3
d. 2:3
Please post the procedure as well. Thanks! 😃
In a right angles triangle ABC, angle C=90 and CD is the perpendicular on the hypotenuse AB, AB=c, BC=a, AC=b and CD=p then
a. p/a = p/b
b. 1/p^2 + 1/b^2 = 1/a^2
c. p^2 = b^2 + c^2
d. 1/p^2 = 1/a^2 + 1/b^2
Please post the procedure as well. Thanks! :)
D is the midpoint of BC of a triangle ABC. DM and DN are the perpendiculars on AB and AC respectively and DM=DN, then the triangle ABC is :
a. right angled
b. isosceles
c. equilateral
d. scalene
Please post the procedure as well. Thanks! 😃
If AD, BE, CF are the altitudes of a triangle ABC whose orthocentre is H, then C is the orthocentre of:
a. Triangle ABH
b. Triangle BDH
c. Triangle ABD
d. Triangle BEA
Please post the procedure as well. Thanks! 😃
Question:
abcde is a 5 digit number such that the digits a, b, c, d, e are in an ascending order. If c
Options:
1. 6
2 .5 (ans)
3. 4
4. 3
A triangle PQR is formed by joining the mid points of the sides of a triangle ABC. O is the circumcentre of triangle ABC, then for triangle PQR, the point O is
a. incentre
b. circumcetre
c. orthocentre
d. centroid
Please post the procedure as well. Thanks! 😃
The point in the plane of a triangle which is at equal perpendicular distance from the sides of the triangle is :
a. centroid
b. incentre
c. circumcentre
d. orthocentre
Please post the procedure as well. Thanks! 😃
Question:
abcde is a 5 digit number such that the digits a, b, c, d, e are in an ascending order. If c
Options:
1.6
2.5
3.4
4.3
Approach and solution
y^4-10y^3+5y^2+100y+100=0
approach please.
for how many values of x are x - 4, x, x + 6 prime numbers between 1 and 100?
a) 3 b)5 c)7 d)9