Examples for secondary school students

Number of problems found: 2028

  • Find the 12
    circle_eq Find the equation of the circle with center (3,7) and circumference 8π units.
  • Same area
    euclid_4 There is a given triangle. Construct a square of the same area.
  • Insert 7
    seq_1 Insert five harmonic means between 3 and 18
  • Reciprocal value
    fx How do I calculate a number x that is 9 greater than its reciprocal (1/x)?
  • Olympics metals
    olympics In how many ways can be win six athletes medal positions in the Olympics? Metal color matters.
  • Percentage increase
    percent_31 Increase number 400 by 3.5%
  • Combinatorics
    fontains The city has 7 fountains. Works only 6. How many options are there that can squirt ?
  • Powers
    1power Express the expression ? as the n-th power of the base 10.
  • Laws
    pyt_triangle From which law follows directly the validity of Pythagoras' theorem in the right triangle? ?
  • Factors
    factors Can the expression ? be factored into rational factors?
  • Wavelength
    wave_length Calculate the wavelength of the tone frequency 11 kHz if the sound travels at speeds of 343 m/s.
  • Tricolors
    Flag_of_the_Netherlands.svg From the colors - red, blue, green, black and white, create all possible tricolors.
  • HP - harmonic progression
    exp_growth_1 Determine the 10th term of the harmonic progression 6,4,3,…
  • What are
    seq What are the four terms between 4 and 19?
  • Tenth member
    10 Calculate the tenth member of geometric sequence when given: a1=1/2 and q=2
  • Five members
    pst3.JPG Write first 5 members geometric sequence and determine whether it is increasing or decreasing: a1 = 3 q = -2
  • Scalar product
    vectors_sum0_2 Calculate the scalar product of two vectors: (2.5) (-1, -4)
  • Bits, bytes
    bits Calculate how many different numbers can be encoded in 16-bit binary word?
  • Tokens
    kamene 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
    reciprocal_1 Find value of unknown x in equation: x+3/x+1=5 (problem finding x)

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