# Examples for secondary school students

#### Number of problems found: 2028

- Find the 12

Find the equation of the circle with center (3,7) and circumference 8π units. - Same area

There is a given triangle. Construct a square of the same area. - Insert 7

Insert five harmonic means between 3 and 18 - Reciprocal value

How do I calculate a number x that is 9 greater than its reciprocal (1/x)? - Olympics metals

In how many ways can be win six athletes medal positions in the Olympics? Metal color matters. - Percentage increase

Increase number 400 by 3.5% - Combinatorics

The city has 7 fountains. Works only 6. How many options are there that can squirt ? - Powers

Express the expression ? as the n-th power of the base 10. - Laws

From which law follows directly the validity of Pythagoras' theorem in the right triangle? ? - Factors

Can the expression ? be factored into rational factors? - Wavelength

Calculate the wavelength of the tone frequency 11 kHz if the sound travels at speeds of 343 m/s. - Tricolors

From the colors - red, blue, green, black and white, create all possible tricolors. - HP - harmonic progression

Determine the 10th term of the harmonic progression 6,4,3,… - What are

What are the four terms between 4 and 19? - Tenth member

Calculate the tenth member of geometric sequence when given: a_{1}=1/2 and q=2 - Five members

Write first 5 members geometric sequence and determine whether it is increasing or decreasing: a_{1}= 3 q = -2 - Scalar product

Calculate the scalar product of two vectors: (2.5) (-1, -4) - Bits, bytes

Calculate how many different numbers can be encoded in 16-bit binary word? - Tokens

In the non-transparent bags are red, white, yellow, blue tokens. We 3times pull one tokens and again returned it, write down all possibilities. - Equation 23

Find value of unknown x in equation: x+3/x+1=5 (problem finding x)

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