Factors and multiples

  • Seven Flipped
    problem

    Seven flipped

    Age
    7 to 11
    Challenge level
    filled star filled star filled star
    Investigate the smallest number of moves it takes to turn these mats upside-down if you can only turn exactly three at a time.
  • Curious number
    problem

    Curious number

    Age
    7 to 11
    Challenge level
    filled star filled star filled star

    Can you order the digits from 1-3 to make a number which is divisible by 3 so when the last digit is removed it becomes a 2-figure number divisible by 2, and so on?

  • Four playing cards on top of each other. Each card shows a different ace.
    problem

    Statement snap

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

    You'll need to know your number properties to win a game of Statement Snap...

  • The Remainders Game
    game
    Favourite

    The remainders game

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

    Play this game and see if you can figure out the computer's chosen number.

  • Dozens
    problem

    Dozens

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

    Can you select the missing digit(s) to find the largest multiple?

  • Got It
    problem

    Got it

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

    A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.

  • missing multipliers
    problem

    Missing multipliers

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

    What is the smallest number of answers you need to reveal in order to work out the missing headers?

  • Neighbourly Addition
    problem

    Neighbourly addition

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

    I added together some of my neighbours' house numbers. Can you explain the patterns I noticed?

  • 3 by 3 Mathdokus
    problem

    3 by 3 Mathdokus

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

    Can you use the clues to complete these 3 by 3 Mathematical Sudokus?