Estimating and approximating

  • Silver Line
    problem

    Silver Line

    Age
    11 to 14
    Challenge level

    Weekly Problem 40 - 2008
    A class raises money for charity by placing 10p pieces edge to edge in a 'silver line'. If the line was 25m long, how much money did they make?

  • Small pepper seedlings in turquoise pots.
    problem

    Thunder and Lightning

    Age
    11 to 14
    Challenge level

    How far away was the lightning if the flash and the thunderclap were 6 seconds apart?

  • Small tomato seedlings in pink pots.
    problem

    Whole Numbers Only

    Age
    11 to 14
    Challenge level

    Can you work out how many of each kind of pencil this student bought?

  • Where am I?
    problem

    Where Am I?

    Age
    11 to 16
    Challenge level

    From the information you are asked to work out where the picture was taken. Is there too much information? How accurate can your answer be?

  • More or less?
    problem

    More or Less?

    Age
    14 to 16
    Challenge level
    Are these estimates of physical quantities accurate?
  • Time to evolve
    problem

    Time to Evolve

    Age
    14 to 16
    Challenge level

    How many generations would link an evolutionist to a very distant ancestor?

  • Big and small numbers in biology
    problem

    Big and Small Numbers in Biology

    Age
    14 to 16
    Challenge level

    Work with numbers big and small to estimate and calulate various quantities in biological contexts.

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