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Student: Suresh Mehta

Q. If the largest angle in a triangle is 80 degrees, what is least possible value of the smallest angle of the triangle?


Answer :

Hi Suresh,
Here is the solution to your question with explanation.

Topic: Geometry, Triangle
Concept: Triangle has three sides and three interior angles. The sum of the interior angles of a triangle is 180 degrees. 

Method: Read More

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Student: Shiva N

Q. I want to know Pi (22/7) is a rational or irrational number and why?


Answer :

Hi Shiva,
Good Question. 
Simply saying π (Pi) is not a rational number. It is an irrational number indeed.

Here is the explanation :

Topic: Algebra, Rational / Irrational Numbers
Concept : Rational numbers are those which can be represented as ratio of two intege...
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Student: Dinkal Airen

Q. How to solve volume and surface area questions. Can you explain the method. Here is the problem. A 5 cm cube is cut into as many 1 cm cubes as possible. What is the ratio of the surface area of the larger cube to that of the sum of the surface areas of the smaller cubes?


Answer :

Hi Dinkal, Thanks for your Question.

Summary : To solve problems related to volume and surface area, we need to visualize the shapes,  think through and solve as mentioned below.
Concepts:

  • Cube is a solid with six congruent square faces.<
  • A cube has six faces which are all squares, so each fac...
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Student: Subroto Ganguly

Q. Can you explain me how to solve this ratio and proportion problems ? Rs.216 is divided among three persons A, B and C such that 8 times A’s share is equal to 12 times B’s share which is equal to 6 times C’s share. How much did A get?


Answer :

Subroto, Thanks for your question.

Here is the solution with explanation.

Topic : Arithmetic, Ratio and Proportion
Concept : This kind of ratio and proportion problems where a certain quantity has to be divided can be solved using by first f...
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Student: Ritu Tiwari

Q. What is the significance of Mean, Median and Mode. What they are used for practically?


Answer :

Ritu,  Thanks for your question.  

Yes many students get confused the differences between mean, median and mode and their significance. Here is the concept and explanation which would help in understanding it better.

Topic: Statistics

Concept : With a large data set, it  would be  hel...
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Student: Senthil Kumar

Q. Why we need to study differential calculus? What is it`s practical significance.


Answer :

Hello Senthil, 


Differential calculus is the study of rates of change of functions.

Let`s take an example first.
Suppose you take a trip from Chennai to Hyderabad. That`s over 600 kms, and it will take about 12 hours depending on the traffic.

Now we know distance = rate x time, So we can figure  average velocity during the trip as 50 kms/hour (dividing 600 kms by 12 hours).

<...
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Student: Amit Yogi

Q. How to solve time and work related problems? These are really very confusing.


Answer :

Yes Amit, Many students find these time-work related word problems very tricky. But if concept and method is well understood, they are really simple to solve it. Here is the way :

Topic: Arithmetic, Time and work

Concept:
Keep in mind is that Resources and Time are inversely proportional. i.e. If there are more ...
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Student: Seema Singh

Q. What are mutually exclusive and independent events? Can you explain with examples.


Answer :

Hi Seema,
In context of probability theory, there are various type of events which are classified into different categories. Taking a 
daily life examples, outcome of tossing a coin, rolling a dice.
Two of most talked about events are Mutually exclusive event and Independent events.

Topic: Probability

Concept...
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Student: Vaishnavi Gupta

Q. Give the equations of two lines passing through (2, 14). Calculate how many more such lines are there also give reason?


Answer :

Hi Vaishnavi,  Thanks for your query. 

Topic: Geometry, Equation of line

Core Concept:
The Greek Mathematician of Euclid`s time derived the notion of point, line, plane etc. from what they have seen around them. They thought of Geometry as an abstract model of world they lived in. Read More

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Student: KIRUBA

Q. Please help me on "HOW TO SOLVE CUBIC POLYNOMIALS" BY SPLITTING THE MIDDLE TERM. THANK YOU!


Answer :

Hi Kiruba,  Good Question.

Here is the concept and method to solve these type of questions.

Topic: Algebra, Rational / Polynomials

Concept : Cubic polynomials can be solved by factor method and splitting middle term. Let's understand with an ex...
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Student: Tulasi N

Q. How to solve this type of Aptitude questions ? In a dairy farm, 40 cows eat 40 bags of husk in 40 days. In how many days one cow will eat one bag of husk?


Answer :

Hi Tulasi,

Really an interesting question !!

 

Topic: Aptitude, Logical reasoning and Quantitative Aptitude

Concept : Apply the concept of deducting to one unit. See the method below to solve these kind of questions.

Method : 

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Student: Joseph T

Q. I am preparing for IBPS exam for bank job. How to solve this kind of aptitude question? Find the missing number in below series : 2, 5, 10, __, 26


Answer :

Joesph,  Here are the steps and explanation to solve number series questions.

Topic : Number Series

Method : Observe the series and see what pattern is followed.

There can be many patterns like  addition, subtraction, squares, cubes, multiples which are simpler one or cobination of one or many of these.

Series given is : 2, 5, 10, __,...
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Student: vinit prabhakar

Q. Can you explain me how to solve this? Find the remainder when 96 + 7 is divided by 8.


Answer :

Thanks Vinit for the Question.  Here is the  concept, method and solution.

Topic : Number System

Concept:  As we know from the "Test of divisibility" concept:

  1. (xn - aRead More

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Student: partha

Q. ( )+( )+( )=30.......Fill the boxies using (1,3,5,7,9,11,13,15) you can also repeted the number


Answer :

Partha,  Thanks for posting question on www.maths-hub.com

Your Question is : ( )+( )+( )=30.......  Fill the boxes using (1,3,5,7,9,11,13,15)  number can be repeated.

Topic : Aptitude

Method : 

  • Constraint 1 : Given numbers a...
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Student: Anup Dhar

Q. Mr.X,a sales person,earns 5% commission on all sales between Taka 20000 & 40000 & 8% on all sales exceeding 40000 in a month.He doesn`t earn any commission if sales in a month amount to less than Taka 20000.His monthly salary is Taka 60000,he has to pay tax 20% on his basic salary,but no tax on commission.in april,2001,the net income (salary+commission) of the sales person was Taka 65000.How much were the sales in April?


Answer :

Hi Anup,  Good Question.

Here is the method and solution.

Topic : Aptitude

Concept and Method :

  • Given Tax brackets are :

For Sales less than  20000,             Tax =  0
Fo...
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Student: Deb

Q. Cp =500 sp =700 then profit percentage?


Answer :

Deb,

Thanks for your question.  It's very simple.  

Topic : Arithmatic - Profit and Loss

Here is the solution :

Method :

Given,

Cost Price (CP) = 500

Selling Price (SP) = 700<...
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Student: sonu yadav

Q. Solve question 6x¼-x½=9


Answer :

Hi Sonu,  Nice question.

Here is the explanation how to solve this kind of problems.

Topic : Algebra - Equation and Simplication

Question :    6x1/4 - x1/2 = 9      Solve for x.

Concept : Read More

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Student: Aryan gupta

Q. A sum of money was lent for 3 year at 12% per annum to ramesh and an equal sum of money was lent to suresh at same rate but for 5year . if the difference in interest received from 2 persons is rs. 1200. Find the sum


Answer :

Hi Aryan,  Thanks for question.

Here is the method to solve this type of question.

Topic : Arithmetic - Simple Interest / Compound Interest

Method : (Assuming it's a simple interest and not compount interest)

Simple Interest = P * R * T / ...
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Student: Somanath dash

Q. Ask Question: Any topic on Maths ?5x-8=2x-9


Answer :

Somanath, Thanks for your question. 

Here is the solution with simple steps :

Topic : Algebra - Equations

Concept : Put constants on LHS and Variable on RHS and solve.

Method :

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Student: Ravi yadav

Q. एक लड़का1.20h में10km पैदाल चलता है तो वह 6 घंटे में कितनी दूर पैदल चला जाएगा


Answer :

रवि, आपके प्रश्न के लिए धन्यवाद।

विधि और समाधान नीचे दिया गया है :

Topic : Arithmetic - Time and Distance

विधि :

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Student: vikas jain

Q. A path 2.5 m wide is running a square field whose side is 45 m. Determine the area of the path


Answer :

Vikas, Thanks for your question. 

Here is the solution with steps :

Topic : Algebra - Equations

Concept :  Field is square shape and path is around that so shape of field including path would also be square share. So Imagine that there are 2 squares, First is  bigger one including the path around it and sec...
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Student: deepa

Q. percentage


Answer :

Hi Deepa,

You have put only "percentage" and not specific question. So I assume that you want to understand the "percentage" concept.

Here it is :

Topic : Arithmetic - Percentage

Concept:

In simple terminology  Percentage mea...
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Student: Simrine

Q. What is the difference between a cube of side 2m and 2m^2


Answer :

Hi Simrine,   Thanks for your interest in maths-hub.

Your question is not clear. Assuming you want to know what is the difference of vloume and surface area for cubes with sides given.

Here is the solution

Topic : Mensuration - Cube, Cylinder, Cone

Concept: Cube of side "a"   Volume = a3 &...
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Student: Hussain

Q. Root x square - 36=8 Whats the answer


Answer :

Husaain,

Here is the solution:

Topic : Squares, Square roots and simplification

Question is   √(x2−36) = 8

Solution : 

Square both sides we get,Read More

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Student: Maya

Q. Side of triangle is 6 more than the height to that side. Area of the triangle is 260 m2 find the length of the side and height


Answer :

Hi Maya,  Thanks for the question.

Here is the solution:

Topic : Triangle

Concept and Method:

Its mentioned that side is 6 more than the height to that side.

It means ...
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Student: shiba prasad rout

Q. --+--+---=30(1, 3, 5, 7, 9, 11, 13, 15)


Answer :

Shilpa,

There can be multiple solutions to this.  It depends on what are the constraints.

Topic : Aptitude

Simplest solution being  :

15 + 5  + (7+3)  = 30  (1, 3, 5, 7, 9, 11, 13...
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Student: Aman

Q. What will be the single discount equivalent to three siluccessive discounts of 20%, 25%and40%


Answer :

Hi Aman,  Here is the solution.

Topic: Arithmetics and Percentage

Method:

Let initial amount be 100

Amount after first 20% discount = 80

Amount after second 25% discount =  0.75 * 80 = 60

Amount after third 40% discount =  ...
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Student: sakshi Tiwari

Q. (4/6)6×(2/3)2×(3/2)x=1 find the value of x


Answer :

Hi Sakshi,  Here is the solution.

Topic : Simplification and Algebra

Method :

Question is (4/6)6×(2/3)2×(3/2)x=1 find the value of x

On solving, (4/6)6×(2/3)2×(3/2)x=1

We get,  4 * (2 / 3 ) * 3 * x = 1

On simplifying, 4 * 2  * x = 1

We get, 8...
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