In-depth Investigation: The Eights Have It
Children multiply numbers starting with 9 by 9 and add single-digit numbers in a decreasing sequence. They identify and describe the patterns and start to explain them.
In-depth Investigation: Nice or Nasty (Game 2, Nasty Version)
Whoever makes the smaller six-digit number wins. Invent your own scoring system. Nice or Nasty (Game 2, Nasty Version) from nrich.maths.org.
In-depth Investigation: This Pied Piper of Hamelin
Investigate the different numbers of people and rats there could have been if you know how many legs there are altogether! This Pied Piper of Hamelin from nrich.maths.org.
In-depth Investigation: Dicey Differences
Children use two dice with decimal numbers to find largest and smallest possible differences, and use mathematical reasoning to calculate the probability of getting close to a specified target.
In-depth Investigation: Crack the Code
Children use logical thinking and number bonds to solve a mathematical puzzle involving multiplying by 10 and 100 and adding decimal numbers.