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- Why is it that (xy)-1 = x-1y-1?(Mathematics)
Asked by: Aastha Posted on: 30/05/2013 - How many minutes past 11AM is it if two hours ago it was three times as many minutes, past 8AM?(Mathematics)
Asked by: Miss Posted on: 23/05/2013 - List the ways in which 7 / 12 can be written as a sum of two fractions in lowest terms such that the denominators of the two fractions are different and neither of them is more than 12.(Mathematics)
Asked by: Miss Posted on: 23/05/2013 - By using four 3's with the mathematical operators ( + , - , / , * ) obtain the results 0, 1, 2 and 3.(Mathematics)
Asked by: Miss Posted on: 23/05/2013 - By using four 4's along with any mathematical operator, make a total of 420.(Mathematics)
Asked by: Miss Posted on: 23/05/2013 - Find the values of sin(x/2), cos(x/2) and tan(x/2) if tan(x)=-4/3.(Mathematics)
Asked by: Ayan Posted on: 15/05/2013 - Prove that (cos2θ)(3+cos4θ) = 4(cos8θ-sin8θ).(Mathematics)
Asked by: Ayan Posted on: 28/04/2013 - If Set A has 3 elements and Set B has 6 elements, prove that the minimum and maximum number of elements in A∪B is 6 and 9 respectively.(Mathematics)
Asked by: Yash Posted on: 27/04/2013 - If n(U)=500, n(F)=285, n(H)=195, n(B)=115, n(F∩B)=45, n(F∩H)=70, n(H∩B)=50, n(H∪B∪F)’=50, then find n(H∩B∩F) and n(H-B-F) + n(B-F-H) + n(F-B-H).(Mathematics)
Asked by: Yash Posted on: 27/04/2013 - If n(M∪B)=25, n(M)=12, n(M-B)=8, then find n(B-M) and n(B∩M).(Mathematics)
Asked by: Yash Posted on: 27/04/2013 - If n(U)=10000, n(A)=4000, n(B)=2000, n(C)=1000, n(A∩C)=400, n(A∩B)=500, n(B∩C)=300, n(A∩C∩B)=200, then find n(A-B-C) and n(A∪B∪C)’.(Mathematics)
Asked by: Yash Posted on: 27/04/2013 - If If n(U)=200, n(M)=120, n(P)=90, n(C)=70, n(M∩C)=50, n(M∩P)=40, n(P∩C)=30, n(P∪C∪M)’=20, then find n(M∩C∩P).(Mathematics)
Asked by: Yash Posted on: 27/04/2013 - If n(U)=60, n(C)=25, n(T)=20, n(C)=11, n(T∩C)=10, then find n(T∪C)’.(Mathematics)
Asked by: Yash Posted on: 27/04/2013 - If n(U)=25, n(M)=15, n(P)=12, n(C)=11, n(M∩C)=5, n(M∩P)=9, n(P∩C)=4, n(M∩C∩P)=3, then find n(C-P-M), n(M-C-P), n(P-M-C), n((P∩C)-M), n((P∩M)-C), n(C-P-M) + n(M-C-P) + n(P-M-C), n(P∪C∪M), n(P∪C∪M)’.(Mathematics)
Asked by: Yash Posted on: 27/04/2013 - If |(z+i5)/(z-i5)| = 1, then prove z is purely real.(Mathematics)
Asked by: Harsh Posted on: 25/04/2013 - How many moles and grams of NaCl are present in 250cm3 of 0.5 molar NaCl solution?(Chemistry)
Asked by: Miss Posted on: 24/04/2013 - Concentration of H2SO4 in its aqueous solution is 98 % by mass and the solution has a density of 1.84g/cm3. What volume of the solution is required to make 5L of 0.5 molar H2SO4 solution?(Chemistry)
Asked by: Miss Posted on: 24/04/2013 - Calculate the area under the curve f(x) = e-x bounded by the positive x and y axes.(Mathematics)
Asked by: Ayan Posted on: 23/04/2013 - In three moles of ethane, calculate the number of moles of carbon atoms.(Chemistry)
Asked by: Tanushree Posted on: 22/04/2013 - What is the number of atoms in 52u of Helium?(Chemistry)
Asked by: Tanushree Posted on: 22/04/2013 - What will be the mass of one atom of Carbon 12 isotope in grams?(Chemistry)
Asked by: Tanushree Posted on: 22/04/2013 - What are pyrenoids?(Biology)
Asked by: Arvind Posted on: 04/04/2013 - Two APs have the same common difference. The first term of one AP is 2 and that of the other is 7. The difference between their 10th terms is the same as the difference between their 21st terms, which is the same as the difference between any two corresponding terms. Why?(Mathematics)
Asked by: Miss Posted on: 07/03/2013 - The location of a dot P at a given time t in the xy plane is given by (x,y) = (t−sint,1−cost). What is the distance traveled by P in the interval 0≤t≤2π?(Mathematics)
Asked by: Miss Posted on: 06/03/2013 - A man is employed to count Rs 10710. He counts at the rate of Rs 180 per minute for half an hour. After this he counts at the rate of Rs 3 less every minute than the preceding minute. Find the time taken by him to count the entire amount.(Mathematics)
Asked by: Miss Posted on: 06/03/2013 - A tank, internally measuring 150cm x 120cm x 110cm, has 129600 cubic cm of water in it. Porous bricks are placed in the water until the cistern is full to the brim. Each brick absorbs one-seventeenth of its own volume of water. How many bricks can be put in it without overflowing the water, each brick having dimensions 22.5cm x 7.5cm x 6.5cm?(Mathematics)
Asked by: Miss Posted on: 06/03/2013 - An AP consists of 37 terms. The sum of the three middle most terms is 225 and the sum of the last three is 429. Find the AP.(Mathematics)
Asked by: Miss Posted on: 05/03/2013 - A boy standing on the ground and flying a kite with 120m of string at an angle of 30. Another boy standing on the roof of a 14m high building and is flying his kite at an angle of elevation of 45. Both boys are standing opposite of both the kites. Find the length of the string that the second boy must have so that the two kites meet.
(Mathematics)
Asked by: Miss Posted on: 05/03/2013 - The ratio of sum of n terms of two AP's is (7n+1):(4n+27). Find the ratio of their mth terms.(Mathematics)
Asked by: Miss Posted on: 05/03/2013 - The sum the first p,q,r terms of an AP are a,b,c respectively. Show that a(q-r)/p + b(r-p)/q + c(p-q)/r = 0.(Mathematics)
Asked by: Miss Posted on: 05/03/2013 - If √2cosθ - √6sinθ = 2√2. Find θ.(Mathematics)
Asked by: Miss Posted on: 05/03/2013 - A right triangle whose sides are 3cm,4cm and 5cm is revolved about the sides containing the right angle in two ways. Find the difference of volumes of the cones so formed.(Mathematics)
Asked by: Miss Posted on: 04/03/2013 - Find the 101st term of the sequence : 4,7,12,19 ................(Mathematics)
Asked by: Miss Posted on: 04/03/2013 - A circular field has a perimeter of 650 m. A square plot having its vertices on the circumference of the field is marked in the field. Calculate the area of the square plot.(Mathematics)
Asked by: Miss Posted on: 04/03/2013 - What is the area of the sector of a circle of radius 5cm, which is formed by an arc of length 3.5cm?(Mathematics)
Asked by: Miss Posted on: 04/03/2013 - Seven years ago Varun's age was five times the square of Swati's age. Three years hence Swati's age will be two fifth of Varun's age. Find their present ages.(Mathematics)
Asked by: Miss Posted on: 04/03/2013 - For what values of k does kx2+12x+9=0 have imaginary roots?(Mathematics)
Asked by: Miss Posted on: 04/03/2013 - A chord of length 10 cm divides a circle of radius 5√2 cm in two segments. Find the area of minor segment.(Mathematics)
Asked by: Miss Posted on: 03/03/2013 - A solid cone of base radius 10cm is cut into two parts through mid points of its height, by a plane parallel to its base. Find the ratio of the volumes of the two parts of the cone.(Mathematics)
Asked by: Miss Posted on: 03/03/2013 - While boarding an aeroplane a passenger got hurt. The pilot showing promptness and concern made arrangements to hospitalise the injured and so the plane started late by 30 min. To reach the destination 1500 km away in time, the pilot increased the speed by 100 km/hr. Find the original speed/hour of the plane.(Mathematics)
Asked by: Miss Posted on: 03/03/2013 - In a figure O is the centre of a circle. PA and PB are tangents forom an external point P touching the circle at points A and B. If OP is equal to the diameter then prove that ABP is an equilateral triangle.(Mathematics)
Asked by: Miss Posted on: 03/03/2013 - The 19th term of an AP is equal to three times its sixth term. If its 9th term is 19,find the AP.(Mathematics)
Asked by: Miss Posted on: 03/03/2013 - There are 3 villages A,B and C such that the distance from A to B is 7Km, from B to C is 5 Km and from C to A is 8 Km. The gram pradhan wants to dig a well in such a way that the distance from each villages are equal. What should be the location of well?(Mathematics)
Asked by: Miss Posted on: 03/03/2013 - ABCD is a square with one side equal to 7cm. It consists of two quadrants ABC and BCD. Their point of intersection is P. Find the area of the shaded region.(Mathematics)
Asked by: Ayan Posted on: 02/03/2013 - The sum of first q terms of an AP is 63q-3q2 .If its pth term is -60,find the value of p. Also,find the 11th term of this AP.(Mathematics)
Asked by: Miss Posted on: 02/03/2013 - Two water taps together can fill a tank in 75/8 hours. The tap of larger diameter takes 10 hours less than the smaller one to fill the tank separately. Find the time in which each tap can separately fill the tank.(Mathematics)
Asked by: Rishabh Posted on: 25/02/2013 - How can I unlock Legendary difficulty level in MotoGP2?(Gaming)
Asked by: Prateek Posted on: 25/02/2013 - Solve for x: 1/(x-1)(x-2) + 1/(x-2)(x-3) + 1/(x-3)(x-4) = 1/16.(Mathematics)
Asked by: Arjun Posted on: 25/02/2013 - If a/(a+b) = 15/21, then find (a+b)/(a-b).(Mathematics)
Asked by: Pallavi Posted on: 24/02/2013 - If the weight of a bucket full of water is 24 kg and weight of the bucket 1/4th full of water is 9 kg, then find the weight of the empty bucket.(Mathematics)
Asked by: Pallavi Posted on: 24/02/2013 - If the mean weight of 8 people is increased by 4 when a person of weight 30 kg is replaced by another man, find the weight of the new man.(Mathematics)
Asked by: Pallavi Posted on: 24/02/2013 - It is proposed to add to a square lawn measuring 58 m on a side, two circular ends.The center of each circle being the point of intersection of the diagonals of the square.Find the area of the whole lawn. (Mathematics)
Asked by: Irene Posted on: 23/02/2013 - What should be the position of an object relative to biconvex lens so that the lens behaves like a magnifying glass?(Physics)
Asked by: Vyomika Posted on: 22/02/2013 - Find the sum of all three digits numbers each of which leave the remainder 3 when divided by 5.(Mathematics)
Asked by: Vyomika Posted on: 22/02/2013 - For what value of 'K' the numbers 3K + 2, 4K + 3 and 6K - 1 are the consecutive terms of an AP?(Mathematics)
Asked by: Vyomika Posted on: 22/02/2013 - If an aeroplane is flying horizontally at a height of 'h' meters from the ground and the angle of depressions of two
consecutive kilometer stones(which are on either sides of the aeroplane) from the it are 'A' and 'B'. Then prove that: h = (tanA.tanB)/(tanA + tanB).(Mathematics)
Asked by: Arjun Posted on: 22/02/2013 - What is catenation?(Chemistry)
Asked by: Sushant Posted on: 20/02/2013 - Coding of internal linking(Computer Science)
Asked by: Ayan Posted on: 19/02/2013 - Coding of external linking(Computer Science)
Asked by: Ayan Posted on: 19/02/2013 - What was the name of the first dog sent to the moon?(General Knowledge)
Asked by: Anand Posted on: 15/02/2013 - The mean of 10 numbers is 20. If 5 is subtracted from every number, what will be the new mean?(Mathematics)
Asked by: Sagar Posted on: 09/02/2013 - The mean of 5 numbers is 18. If one of the numbers is excluded, their mean is 16. Then the excluded
number is ___?(Mathematics)
Asked by: Sagar Posted on: 09/02/2013 - Find the co-ordinates of the point at which the perpendicular bisector of the line segment joining the points (1,5) and (4,6) cuts the y-axis.(Mathematics)
- If z = x + iy, then |2z - i| / |z + 1| = m represents a circle when m is not equal to ____?(Mathematics)
Asked by: Kanishkh Posted on: 16/01/2013
