Recently Active Class Vii X Mathematics Questions

0.000027^(2/3)=? ...

Why do distant hills covered with trees appear blue? ...

can someone geometrically prove... tan (-A) = -tan A ...

Write a 2-digit number ab and the number obtained by reversing its digits i.e., ba. Find their sum. Let the sum be a 3-digit number dad.Find the values of a and d. ...

Q) Find the maximum radius of a semi-circle that can be placed inside a square of side 'a' ...

I've got a problem which I am not sure of the method of solving. 3x + 36 x 2 = 37 3x + 729 x 2 = 36 x 3 3x + 1458 = 729 x 3 3x = 2187 - 1458 3x = 729 3x = (3)6 x = 6 But isnt there any other method of solving? Please help ...

*Image* Let a ΔABC with <BAC=60°. Bisectors of angles <ABC and <ACB be BE and CF respectively. Let BE and CF intersect at I(Incentre). So, we get <BIC=90°+1/2(<BAC) =120° So, <BIC=2<BAC. Therefore I i ...

find x such that 1+ 1/1+ 1/1+ =x . . 1+ 1/x ...

Given two straight lines. Can you show a bijective mapping of one onto the other? ...

*Image* In the given figure, a chord AB of a circle of 10cm radius subtends a rt. angle at the centre O.Find the area of the sector OABC & of the major segment.(pie=3.14) ...

This is a good prob from my Xth mathematika... and so i thought of sharing it with u all... *Image* ABCD is a square with each sides equal to 10 cm and in which ABC and BCD are the quadrants where arcs BD and AC intersect at ...

Here an Isosceles triangle is inscribed in a square. The angle A is given by 15 degree... prove that the triangle formed below is an equilateral triangle. *Image* ...

A lighthouse, facing north, sends out a fan-shaped beam of light extending fron north-east to north-west. An observer on a steamer, sailing due west, first sees the light when he is 5 km awayfrom the lighthouse, and continues ...

1.Prove that the number between a pair of twin prime numbers is always divisible by 2. Twin prime numbers are prime numbers whose difference is 2. ...

You people in 9th and 10th might find this really useful :) http://library.thinkquest.org/20991/alg2/graphs.html ...

A man started from his home at 14:30 hrs and drove to a village, arriving there when the village clock indicated 15:15 hours. After staying for 25 minutes he drove back by a different route of length (5/4) times the 1st route ...

If a number n can be expressed as sum of two perfect squares prove that 2^{17^{17^{17^{17}}}}n can also be expressed as sum of two squares. ...

find all positive integers n for which n! + 5 is a perfect cube. ...

let m and n be positive integers such that lcm(m,n) + gcd(m,n) = m+n. then prove one of the number is divisible by the other. ...

How do you decide if or not a fraction is terminating? ...

On a chessboard, the positive real numbers are entered into the squares in such a way that every number is the arithmetic mean of its neighboring squares . Is this possible? If possible then prove it. ...

is 2.222...........= 10*(0.2222........) because 2.2222.... contains some infinite digits and 0.222.... contains another infinite digits also so, some infinite value = another infinite value ...

In an A.P. the fourth and the seventh terms are 17 and 23 respectively. Now find 'd' and 'a'. ...

Is 0 = 0? ...

1/1+ 2 + 1/ 2 + 3 + 1/ 3 + 4 + 1/ 4 + 5 +.........................till + 1/ 15 + 16 . simplify this problem. ...

2x2-7x+3=0 solve this quad. equation by completing the square method ...

Help me prove that a} xo=1 b}If two triangles are equiangular ,then their corresponding sides are proportional. ...

Is zero both +ve & -ve? Why can't any number be divided by 0? ...

Prove that 2 is a rational or an irrational ...

Find the least number which when divided by 24,32 and 36 leaves the remainder 19,27,31 respectively. can it be done using Euclid's division lemma. If yes then how? ...