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#1 Re: Ganesh's Puzzles » 10 second questions » Today 18:50:23

Hi;

The solution #6084 is correct. Good work, bobbym!

#6085. Find the sum of first 75 natural numbers.

#6086. Find the sum 5 + 10 + 15 + ..... + 250.

#2 Re: Exercises » Compute the solution: » Today 18:24:54

Hi;

The solution 581 is correct. Excellent, bobbym!

582. Find the values of p and q so that (x + 2) and (x - 1) are the factors of the polynomial

#3 Re: Exercises » Compute the solution: » Yesterday 22:14:37

Hi;

The solution 580 is correct. Excellent, bobbym!

581. Evaluate:

.

#4 Re: Ganesh's Puzzles » Oral puzzles » Yesterday 18:25:04

Hi;

#3684. Find the area of the triangle ABC given A(6,7), B(2,-9), and C(-4,1).

#5 Re: Ganesh's Puzzles » 10 second questions » Yesterday 17:40:00

Hi;

Revised problem #6084 : In a class test, the sum of Kamal's marks in Maths and English is 40. Had he got 3 marks more in Maths and 4 marks less in English, the product of their marks would have been 360. Find his marks in the two subjects.

#6 Re: Ganesh's Puzzles » 10 second questions » 2017-02-24 22:35:37

Hi;

Revised problem #6084 : In a class test, the sum of Kamal's marks in Maths and English is 40. Had he got 3 marks more in Maths and 4 marks in English, the product of their marks would have been 360. Find his marks in the two subjects.

#7 Re: Exercises » Compute the solution: » 2017-02-24 17:42:26

Hi;

The solution 579 is correct. Excellent, bobbym!

580. A card is drawn from a well shuffled pack of 52 cards. Find the probability of
(i) a red card
(ii) a king
(iii) a card of club
(iv) a black ace
(v) a king of heart

#8 Re: Ganesh's Puzzles » 10 second questions » 2017-02-24 17:19:05

Hi;

The solution #6083 is correct. Excellent, bobbym!

#6084. The roots of

are equal, then a + c = ?

#9 Re: Ganesh's Puzzles » 10 second questions » 2017-02-23 21:42:16

Hi;

The solution #6082 is correct. Good work, bobbym!

#6083. If the points A(x,2), B(-3,-4) and C(7,-5) are collinear, then the value of x is _______.

#10 Re: Ganesh's Puzzles » 10 second questions » 2017-02-23 18:06:51

Hi;

The solution #6081 is perfect. Excellent, bobbym!

#6082.(a) A bag contains 5 red and 4 black balls. A ball is drawn at random from the bag. What is the probability of getting a black ball?

#6082.(b) An ordinary dice is thrown. Find the probability that the number obtained is a factor of 6.

#11 Re: Exercises » Compute the solution: » 2017-02-22 18:02:58

Hi;

579. From the top of a tower 100 m high, a man observes two cars on the opposite sides of the tower with angles of depression 30 degrees and 45 degrees respectively. Find the distance between the cars.

#12 Re: Ganesh's Puzzles » 10 second questions » 2017-02-22 17:50:45

Hi;

The solution #6080 is correct. Excellent, bobbym!

#6081. If the coordinates of points A and B are (-2,-2) and (2,-4) respectively, find the coordinates of P such that AP = (3/7)AB, where P lies on the line segment AB.

#13 Re: Ganesh's Puzzles » 10 second questions » 2017-02-21 22:12:21

Hi;

The solution #6079 is correct. Neat work, bobbym!

#6080. Find the area of a triangle whose vertices are (3,8), (-4,2) and (5,1).

#14 Re: Ganesh's Puzzles » 10 second questions » 2017-02-21 16:44:45

Hi;

The solution #6078 is correct. Neat work, bobbym!

#6079. A(3,2) and B(-2,1) are the two vertices of triangle ABC, whose centroid G has coordinates (5/3,-1/3). Find the coordinates of the third vertex C of the triangle.

#15 Re: Exercises » Compute the solution: » 2017-02-21 16:32:57

Hi;

The solution 577 (four parts) is correct. Excellent, bobbym!

578. A semicircular sheet of metal of diameter 28 cm is bent into an open conical cup. Find the depth and the capacity of the cup.

#16 Re: Ganesh's Puzzles » 10 second questions » 2017-02-21 00:48:21

Hi;

The solution #6077 (two parts) is correct. Excellent, bobbym!

#6078. Find the points which divide the line segment joining (8,12) and (12,8) into four equal parts.

#17 Re: Exercises » Compute the solution: » 2017-02-20 21:40:14

Hi;

577. A bag contains 3 red, 5 black and 7 white balls. A ball is drawn from the bag at random. Find the probability that the drawn ball is
(i) white
(ii) red
(iii) not black
(iv) red or white

#18 Re: Exercises » Compute the solution: » 2017-02-20 19:25:14

Hi;

The solution 575 (three parts) is correct. Excellent, bobbym!

576. A hemispherical tank, full of water, is emptied by a pipe at the rate of 25/7 liters per second. How mach time will it take to empty half the tank if diameter of the tank is 3 m?

#19 Re: Ganesh's Puzzles » 10 second questions » 2017-02-20 19:01:30

Hi;

#6077. Find the ratio in which C(p,1) divides the join of A(-4,4) and B(6,-1) and hence find the value of p.

#20 Re: Ganesh's Puzzles » 10 second questions » 2017-02-20 15:39:34

Hi;

The solution #6075 is correct. Well done, bobbym!

#6076. If the points A(4,3) and B(x,5) are on the circle with the center O(2,3), find the value of x.

#21 Re: Exercises » Compute the solution: » 2017-02-20 15:19:44

Hi;

The solution 574 (two parts) is correct. Excellent, bobbym!

575. All the three face cards of spades are removed from a well-shuffled pack of 52 cards. A card is drawn at random from the remaining pack. Find the probability of getting
(i) a black face card
(ii) a queen
(iii) a black card

#22 Re: Ganesh's Puzzles » Oral puzzles » 2017-02-19 22:41:32

Hi;

The solution #3681 is correct. Good work, bobbym!

#3682. Find the diameter of a circle whose circumference is 628 cm. Use

#3683. If the perimeter of a semi-circle is 36 cm, find the diameter.

#23 Re: Exercises » Compute the solution: » 2017-02-19 22:23:07

Hi;

The solution 573 is correct. Excellent, bobbym!

574. A bag contains 5 red, 8 green and 7 white balls. One ball is drawn at random from the bag. Find the probability of
(i) a white ball or a green ball
(ii) neither a green ball nor a red ball

#24 Re: Ganesh's Puzzles » 10 second questions » 2017-02-19 19:12:17

Hi;

The solutions #6073 and #6074 are correct. Neat work, bobbym!

#6075. A die is thrown once. Find the probability of getting
(i) an even number
(ii) a prime number
(iii) a number greater than 4

#25 Re: Ganesh's Puzzles » Oral puzzles » 2017-02-19 18:51:21

Hi;

The solution #3680 is correct. Neat work, bobbym!

#3681. If the nth term of an Arithmetic Progression is (2n + 1), then the sum of first three terms is ____________

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