Here you can find a compilation of the questions that were sent to *matematica.pt* through the Contact page. The most interesting ones have been selected (with slight adaptations) and it is listed here not only the question as the answer.

- What does a prime number consists in?
- Are all the squares rectangles?
- What is a modulus of a number?
- Are all the squares rhombuses?
- Is zero an even number?
- Circumference and circle: Are they the same?
- Why does every number raised to the power of zero equal one?
- What is an even function?
- What is a regular polygon?
- What is an odd function?
- What are divisible criteria?
- I have difficulty in the times table, can you help me?
- What is a rational number?
- What is the difference between a convex and a non-convex polygon?
- What is the difference between an internal and an external angle?
- Natural logarithm and Napierian logarithm: Are they the same thing?
- How much time does 1 million seconds correspond to?
- What is a fractional number?
- Why can’t we divide a number by zero?
- What is a trigonometric circle?
- Are weight and mass the same thing?
- What is the slope of a straight line?
- How many zeros are there in a billion?
- What is a check digit?
- Was Mathematics invented or found?
- Why does a circle measure 360 degrees?
- Regarding polynomials – What does the remainder theorem consist of?
- What do Googol and Googolplex mean?
- What is the Hondt method?
- What does harmonic mean consist of?
- How does the rule of three work with direct proportionality?
- How does the rule of three work with inverse proportionality?
- What is Maths?
- What order must letters have to name an angle?
- Why are there leap years?
- What is the right order of the mathematical operations?
- Why are there two scales to measure temperature?
- Is it likely to win the Euromilhões?
- When I write 2K, Am I using a roman algorithm?
- Is volume and capacity the same thing?
- How do you get the size number of your footwear?
- What is a light–year?
- How does interest work?
- How to make a rounding off?
- How do you calculate the Body Mass Index?
- How to calculate a discount?
- What is inflation?
- What relation is there between Maths and Music?
- What is a golden number?
- What are perfect numbers?
- How does a GPS work?
- How do you read a number according to Roman Numerals?
- Why do we use the letter m to represent the slope?
- What is the difference between a quadrangular prism and a parallelepiped?
- How is Easter day calculated?
- What is the importance of prime numbers?
- How to calculate compound interests?
- How do you do the casting out nines?
- Why isn't there a Nobel Prize for Mathematics?
- What is the name of the terms of the four essential arithmetic operations?
- How do you distinguish permutations from combinations?
- What is the Pythagoras's Theorem for?
- What is an equation?
- What is a quadratic equation?
- What are relatively prime numbers?
- Why do I have to learn Maths?
- What are the three famous problems of ancient times?
- What are the numbers belonging to the Fibonnacci's sequence?
- How to solve first degree equations?
- How many subsets are there in a set?
- What are conic sections?
- What is the difference between cardinal and ordinal numbers?
- How do I convert a decimal number into a fraction?
- Can we say that today is twice hotter than yesterday?
- If I multiply two negative numbers the result will be a positive one, why does it happen?
- How do you calculate successive percentages?
- What is trigonometry for?
- What is the Fermat's Last Theorem?
- How many centimetres is an inch?
- What is a Parabola?
- What is an ellipse?
- How many water drops are there in the ocean?
- Does 30% of inclination mean the triple of 10%?
- What is the Pascal's Triangle useful for?
- How can we solve problems?
- What is a point of inflection?
- What are absolute and relative extremes?
- How do I convert a number into Roman Numerals?
- What are natural, whole and rational sets?
- How do you calculate a square root without a calculator?
- What is the scientific notation?
- How to calculate the G.C.D.?
- How do you calculate the L.C.M.?
- What is the history of number pi?
- What is the Integral and Differential calculus useful for?
- What relation is there between the volume of a cone and the one of a cylinder?
- How do you calculate the sum of all the terms of a succession?
- What are scales useful for?
- How do you calculate the area of a cylinder surface?
- What are isometries?
- Why kids under-perform in math?

If you have any pertinent (math) question whose answer can not easily be found, send us an email on the Contact page with the question. We will be happy to respond. In the event that you detect any errors in our answers, do not hesitate to contact us!