Square numbers are those numbers which is obtained by multiplying the number by itself.....usually taken for the natural numbers(counting numbers like 1,2,3,...................)

So, the square numbers are.................. 1,4,9,16,etc..............

Hope you can now find all the remaining square numbers............

x/2=15/6

First reducing the proportion to the lowest ratio, we get

x/2 = 5/2

Now, multiplying both sides by 2,we get

x = 5 

hope you got it........

there is no such formula for finding the volume of a triangle.....cannot be found since it is a 2-dimensional figure............................but the resembling figure: Pyramid has the volume which is given by 1/3  x Area of base x height of pyramid.

Hope you get it.........

change of concentration by adding water(generally) or other liquids to the given concentration.

12 inches

Here, 7= 7 × 1

8 = 2 × 2 × 2

and 10 = 2 × 5

So, least common multiple = 2×(2 × 2 × 5 × 7) = 280

Hope you got your answer.

Use the relation 

1 cubic meter = 1000 liter

and convert the given quantity of cubic meter into liter.

Hope this helped you to some extent.

Simple logic is to divide the numerator and denominator by their common factor

Here, the common factor for the given term is 2, so divide it by 2, then

the required lowest degree term is: 8/9

Hope this helped you to some extent.

Here is a simple logic to solve such kind of problem.

5/7 and 4/10

Cross Multiply the numerator and denominator,

i.e. 5 * 10 >7*4

i.e. 50 >28

So, 5/7 < 4/10

Hope you got the answer.

Note: To solve such kind of problem, you can make the denominator of both expressions same and compare the numerator of the numbers.

Divide your question by 10

i.e. 100/10 = 10 cm

Hope you got your answer.