Estimating and approximating

  • Time to evolve
    problem

    Time to evolve

    Age
    14 to 16
    Challenge level
    filled star empty star empty star
    How many generations would link an evolutionist to a very distant ancestor?
  • Power Countdown
    problem

    Power countdown

    Age
    14 to 16
    Challenge level
    filled star empty star empty star

    In this twist on the well-known Countdown numbers game, use your knowledge of Powers and Roots to make a target.

  • Big and small numbers in biology
    problem

    Big and small numbers in biology

    Age
    14 to 16
    Challenge level
    filled star filled star empty star

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

  • A question of scale
    problem

    A question of scale

    Age
    14 to 16
    Challenge level
    filled star filled star empty star

    Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?

  • The Fastest Cyclist
    problem

    The fastest cyclist

    Age
    14 to 16
    Challenge level
    filled star filled star empty star

    Andy is desperate to reach John o'Groats first. Can you devise a winning race plan?

  • Ladder and Cube
    problem

    Ladder and cube

    Age
    14 to 16
    Challenge level
    filled star filled star filled star

    A 1 metre cube has one face on the ground and one face against a wall. A 4 metre ladder leans against the wall and just touches the cube. How high is the top of the ladder above the ground?