[16]   Page 7    Perfect Numbers
[17]   Page 8    Prime numbers visually
[29]   Page 14  The Missing Dollar Paradox
[37]   Page 18  Difference between two dates

Chapter 3 - Fractions

[74]   Page 37    Left-handedness
[88]   Page 43    Adding fractions
 

Chapter 5 - Ratios and Rates

[162]  Page 80   Colour mixing (RGB) (1)
[162]  Page 80   Colour mixing (RGB) (2)   

Chapter 6 - Approximations, standard form and estimation

[173]  Page 86    When are zeros significant?
[187]  Page 93   US National Debt Clock
[187]  Page 93   World population clock
[194]  Page 96   Standard form converter
[194]  Page 96   The scale of the universe

Chapter 7 - Formulae and substitution

[214]  Page 106   Pyramid numbers (sums of squares) (1)
[214]  Page 106   Pyramid numbers (sums of squares) (2)

Chapter 11 - Two pairs of brackets

[307]  Page 153   Difference of two squares

Chapter 12 - Two-dimensional Graphs

[339]  Page 170   The Body-Mass Index Calculator

Chapter 13 - Graphs using rules from algebra

[373]  Page 188   Straight-line grapher from rule(1)
[373]  Page 188   Straight-line grapher from rule(2)

Chapter 14 - The metric system, scales and tables

[402]  Page 204  Metric length conversions
[410]  Page 207  Ferris wheel - metric conversion challenge
[416]  Page 210  Is midday 12 am or 12 pm?

Chapter 15 - Area of polygons

[446]  Page 227    Area of parallelograms
[447]  Page 227    Area of trapeziums
[450]  Page 229    Honey, I've shrunk the area!

Chapter 16 - Circles - circumference and area

[463]  Page 236   Pi to one million decimal places
[463]  Page 236   Pi to more decimal places than you will ever need 
[463]  Page 236   The Greek alphabet

Chapter 17 - Volume and surface area

[489]  Page 250   Surface area and volume of cuboids
[506]  Page 258   Prism calculator

Chapter 18 - Angles 1 - intersecting and parallel lines

[524]  Page 267   Security Sensor question part 2d
[532]  Page 271   Sum of angles of a triangle
[541]  Page 276   Alternate angles and angles in a triangle

Chapter 19 - Angles 2 - Polygons

[562]  Page 287   Exterior angles of a polygon



Chapter 20 - Tessellation

[571]  Page 292   Tessellation town
[571]  Page 292   The tessellator
[571]  Page 292   Tessellation links
[575]  Page 294   Tetrominoes on a chessboard
[581]  Page 297   Grids for colouring in tessellations

Chapter 21 - Three dimensions

[587]  Page 300   The Klein bottle
[587]  Page 300   The missing corner cube
[588]  Page 301   Platonic solids
[603]  Page 309   Side views (1)
[603]  Page 309   Side views (2)
[607]  Page 311   The pentagonal potato slice

Chapter 22 - Pythagoras

[613]  Page 314   Pythagoras demonstration
[613]  Page 314   Three squares
[637]  Page 326   The spider and the fly

Chapter 24 - Trigonometry 2 - Calculating any side length

[677]  Page 347   SOH-CAH-TOA mnemonics
[693]  Page 355   The moving cuboctahedron

Chapter 26 - Construction, scale drawing and loci

[710]  Page 364   Perpendicular bisector
[712]  Page 365   Perpendicular to a line from a point not on the line
[714]  Page 366   Perpendicular to a line at a point on the line
[720]  Page 369   Perpendicular bisectors of a triangle
[726]  Page 372   Loco for Loci Desmos by Dan Meyer

Chapter 27 - Transformations 1 - Symmetry and enlargement

[756]  Page 387   The Diamond 16 Puzzle
[774]  Page 396   Frieze patterns




Chapter 30 - Displaying statistical information

[827]  Page 424   Pie graphs
[831]  Page 426   All Black Test appearances
[838]  Page 430   Vowel frequency analysis
[848]  Page 435   National Climate Centre - El Nino

Chapter 31 - Working with data

[855]  Page 439   The mode
[870]  Page 447   Stem and leaf plotter
[874]  Page 449   Boxplots
[894]  Page 460   Car registration statistics

Chapter 32 - The statistical enquiry cycle

[899]  Page 463   CensusAtSchool

Chapter 33 - Probability

[939]  Page 484   The racing cars
[943]  Page 486   Tongue-rolling