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# Ask a Mathematics(Class IX-X Tuition) Question

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P

Priya 03/11/2016 in  Mathematics(Class IX-X Tuition),

The denominator of a fraction is one more than twice the numerator. If the sum of the fraction and its reciprocal is 16/21, find the fraction?

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S

Sonia 03/11/2016 in  Mathematics(Class IX-X Tuition),

The product of Ramu’s age (in years) five years ago and his age (in years) nine years later is 15. Determine Ramu’s present age?

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A

Advaith 03/11/2016 in  Mathematics(Class IX-X Tuition),

The sum of two natural numbers is 8. Determine the numbers, if the sum of their reciprocals is 8/25?

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D

Datta 04/11/2016 in  Mathematics(Class IX-X Tuition),

If R is the relation “less than” from A = {1, 2, 3, 4, 5} to B = {1, 4, 5}, write down the set of ordered pairs corresponding to R. Find the inverse relation to R?

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M

Misha 04/11/2016 in  Mathematics(Class IX-X Tuition),

If A = {1, 2, 3}, B = {4}, C = {5}, then verify that: A x (B union of C) = (A x B) union of (A x C)?

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S

Sriram 04/11/2016 in  Mathematics(Class IX-X Tuition),

If R is the relation in N x N defined by (a, b) R (c, d) if and only if a + d = b + c, show that R is an equivalent relation?

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D

Dinesh 04/11/2016 in  Mathematics(Class IX-X Tuition),

Let A = {1, 2, 3, 4} and S = {(a, b): a belongs to A, b belongs to A, a divides b}. Write S explicitly?

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P

Priyanka 04/11/2016 in  Mathematics(Class IX-X Tuition),

Let A and B be two sets such that n(A) = 3 and n(B) = 2. If (x, 1), (y, 2), (z, 1) are in A x B, find A and B, where x, y, z are distinct elements?

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R

Rasneet 04/11/2016 in  Mathematics(Class IX-X Tuition),

Let A = {1, 2}, b = {1, 2, 3, 4}, C = {5, 6} and D = {5, 6, 7, 8}. Verify that A x C subset of B x D?

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N

Navneet 04/11/2016 in  Mathematics(Class IX-X Tuition),

Let A be non empty set such that A x B = A x C. Show that B = C?

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R

Rajendra 04/11/2016 in  Mathematics(Class IX-X Tuition),

Let A = {1, 2, 3, 4} and B = {x, y, z}. Let R be a relation from A to B defined by R = {(1, x), (1, z), (3, x), (4, y)}. Find the domain and range of R?

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P

Pooja 04/11/2016 in  Mathematics(Class IX-X Tuition),

Let A = {1, 2, 3, 4} and B = {x, y, z}. Let R be a relation from A to B defined by R = {(1, x), (1, z), (3, x), (4, y)}. Draw the arrow diagram of relation R?

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C

Chinmayee 04/11/2016 in  Mathematics(Class IX-X Tuition),

In N x N, show that the relation defined by (a, b) R (c, d) if only if ad = bc is an equivalence relation?

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K

Krishna 04/11/2016 in  Mathematics(Class IX-X Tuition),

Define range and domain in terms of relation?

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P

Poonam 04/11/2016 in  Mathematics(Class IX-X Tuition),

Define relation with respect to mathematics?

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R

Ramkumar 04/11/2016 in  Mathematics(Class IX-X Tuition),

Define equivalence relation?

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N

Neha 04/11/2016 in  Mathematics(Class IX-X Tuition),

Let A = {1, 2}. List all the relations on A?

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G

Girija Sankar 04/11/2016 in  Mathematics(Class IX-X Tuition),

Let A = {x, y, z} and B = {1, 2}. Find the number of relations from A into B?

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D

Datta 02/11/2016 in  Mathematics(Class IX-X Tuition),

What is the side of the square if the total surface area of a cube is 96 sq. cm?

Ankit replied | 23/11/2016

4 cm.

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H

Hariprasad 02/11/2016 in  Mathematics(Class IX-X Tuition),

What do you mean by dimensions of any geometrical shapes?

Chandan replied | 22/11/2016

Two geometric shapes that share the same basic shape are called "similar to each other." If both shapes are the same size, they are called "congruent." Geometric shapes can be two-dimensional or flat. They can be three-dimensional, meaning they possess depth and volume.

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A

Arun 02/11/2016 in  Mathematics(Class IX-X Tuition),

The volumes of the two spheres are in the ratio 64 : 27. Find the ratio of their surface areas?

Ankit replied | 23/11/2016

16 : 9.

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P

Purushotham 02/11/2016 in  Mathematics(Class IX-X Tuition),

Two cubes each of volume 64 cubic cm are joined end to end. Find the total surface area of the resulting cuboid?

Sreedevi replied | 02/12/2016

T.S.A of cuboid = 2 (lb+bh+lh);Given volume of the cube = 64 cubic cm.
From this we can find the length of the side of the cube by taking the cube root of 64 and it is equal to 4.
Now we have length of the cube = breadth of the cube = height of the cube = 4cm.
On joining 2 such cubes, we get length of the cuboid = 4+4 =8 cm; breadth and height remain same as we are...  more»
T.S.A of cuboid = 2 (lb+bh+lh);Given volume of the cube = 64 cubic cm.
From this we can find the length of the side of the cube by taking the cube root of 64 and it is equal to 4.
Now we have length of the cube = breadth of the cube = height of the cube = 4cm.
On joining 2 such cubes, we get length of the cuboid = 4+4 =8 cm; breadth and height remain same as we are joining the two cubes side by side.
On substituting the values, we get T.S.A = 160 square cm «less

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V

Venkatesan 02/11/2016 in  Mathematics(Class IX-X Tuition)

In the class intervals 10-20, 20-30, the number 20 is included in_____ ?

Abhishek replied | 10/12/2016

20-30

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S

Sumimolss 02/11/2016 in  Mathematics(Class IX-X Tuition),

Can the experimental probability of an event be a negative number? If not why?

Sreedevi replied | 02/12/2016

The probability of the outcome of an experiment is never negative.

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K

Kiran 02/11/2016 in  Mathematics(Class IX-X Tuition),

Can the experimental probability of an event be greater than 1? Justify your answer?

Sreedevi replied | 02/12/2016

No, because the number of successes and failures should be equal to 1.

Sreedevi replied | 02/12/2016

No, because the number of successes and failures should be equal to 1.
The probability of an event will not be less than 0. This is because 0 is impossible (sure that something will not happen). The probability of an event will not be more than 1. This is because 1 is certain that something will happen.

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