2,579 Answered Questions for the topic Maths

Maths Summation

04/02/16

Sequence and series
The value of n(sigma)i=1 i(Sigma)j=1 j(Sigma)k=1 =220, then the value of n is    (*Sigma here is the summation sign)  The options are  11,12,10,9
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04/02/16

Sequence and series
Let a = 111....1 (55 digits), b= 1+10+10^2..+10^4, c= 1+ 10^5 +10^10 + 10^15 +..... +10^50, then which of the following is correct :   1) a=b+c 2)a=bc 3) b=ac 4) c=ab
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Maths Modulus

04/01/16

Inequality absolute value function
The question is |x|<2/x   When x>0 X^2<2   X belongs to (0,sqrt2)   When x<0  Then x^2> - 2 Which is true for all values of x So in this case x belongs to (-infinity,... more
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04/01/16

Absolute value function, modulus function
|x|+|y| = |x+y| then xy>0 |x|-|y|  =|x-y| then xy < 0   Can you please explain the above absolute value function properties and give some examples on the same 
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04/01/16

Sequence and series
If tn= (n+2)(n+3)/4 for n=1,2,3..... Then find the sum of 1/t1 + 1/t2 + 1/t3.... 1/t2003
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Maths

03/31/16

Maths Question
Solve for x:   4 - 1/2 (x + 5) =16
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Maths

03/31/16

Maths Question
7s + 4 (3 - s) = 18   What is s
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Maths

03/30/16

maths probability help
A large school in the UK offers its pupils the opportunity to learn several non-English languages. It turns out that: • 55% of pupils in this school choose to learn French; • of the pupils who... more
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Maths

03/29/16

Find the sum of the multiples of 3 or 7 under 875 For example
Find the sum of the multiples of 3 or 7 under 875For example, if we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
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Maths

03/26/16

Maths Question
What is the diameter, to the nearest tenth of a meter, of a circle whose area is 15.9 square meters?   1.    5 meters   2.    2.3 meters   3.    4.5 meters   4.     9 meters
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Maths

03/26/16

Maths Question
On a scale drawing, the scale is 1/18.  A basketball backboard system is 6 inches tall on the drawing. What is the height of the actual basketball system.     1.  36 inches or 3 ft   2.  240... more
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Maths

03/26/16

Maths Question
which expression best represent Pi     1.  c - d   2.  c + d   3.  c x d   4.  c divided d
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03/26/16

Sequence and series
Sum to n terms of series    1^2 -  2^2 + 3^2 - 4^2 + 5^2 - 6^2 +....... 
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Maths

03/21/16

A man's salary is 30000Rs per month. His annual increment is 15000 Rs. What will be his salary after 20 years of service?
Maths problem
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Maths

03/20/16

A school has 690 Pupils and teachers altogether.
A school has 690 Pupils and teachers altogether. There are 3 times as many girls as boys, there are 25 more teachers than boys. How many pupils are there? How many teachers are there?
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Maths

03/20/16

3x^3-7x^2+8x+4/(x-2)^2(x^2+4)
Hi. Can someone explain to me how to do this partial fraction . 
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03/19/16

can someone help me make a 4x4 magic square for the number -7
please help I'm really stressed.
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Maths Numbers

03/19/16

how to calculate interior and exterior angles of a polygon
not sure what this is but it asks to do so in my test     
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Maths Numbers

03/19/16

hey guys can someone help me with simple and compound interest please
not sure what this is but it asks to do so in my test     
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Maths

03/19/16

what is a compound unit (maths)
not sure what this is but it asks to do so in my test     
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03/19/16

how to use fractions ratio and proportion in the same situation
no sure how to do this but it asks to do so in my test     
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03/19/16

48 kg of apples cost $96. How many kilograms of apples can you get with $6 ?
i seem to be getting 32 if anyone could tell me how to get the right answer that would be greatly appreciated  
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Maths

03/18/16

A school has 200 students.
Question A school has 200 students. One third of the boys have blue eyes,and one quarter of the girls have blue eyes. Given that a total of 57 students have blue eyes,how many boys attend the school? more
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Maths

03/18/16

type a coffee costs $4.35 per pound and type b coffee costs $5.45 per pound. With 124 pounds of coffee for $602.10, how much of that is type b coffe
type a coffee costs $4.35 per pound and type b coffee costs $5.45 per pound. With 124 pounds of coffee for $602.10, how much of that is type b coffee?
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Maths

03/12/16

mean word problems
the mean weight of 8 boys is 55kg and mean weight of some girls is 37kg. find how many girls were there?
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