Skip to main content
Take a look at our new
Primary
and
Secondary
tasks open for students' solutions
Main navigation
Teachers
expand_more
Early years
Primary
Secondary
Post-16
Students
expand_more
Primary
Secondary
Post-16
Parents
expand_more
Early years
Primary
Secondary
Post-16
Problem-Solving Schools
expand_more
What is the Problem-Solving Schools initiative?
Becoming a Problem-Solving School
Charter
Resources for PD
Hub
PD and Events
expand_more
Resources for PD
Events
Newsletters
About NRICH
expand_more
About us
Impact stories
Support us
Our funders
Contact us
search
menu
search
close
Search NRICH
search
Or search by topic
Number and algebra
Algebraic expressions, equations and formulae
Coordinates, functions and graphs
Patterns, sequences and structure
Properties of numbers
Place value and the number system
Fractions, decimals, percentages, ratio and proportion
Calculations and numerical methods
Geometry and measure
3D geometry, shape and space
Transformations and constructions
Vectors and matrices
Measuring and calculating with units
Pythagoras and trigonometry
Angles, polygons, and geometrical proof
Probability and statistics
Handling, processing and representing data
Probability
Working mathematically
Thinking mathematically
Mathematical mindsets
Advanced mathematics
Decision mathematics and combinatorics
Mechanics
Calculus
Advanced probability and statistics
For younger learners
Early years foundation stage
Solution
Sealed Solution Kian
Problem / game
Sealed Solution
Back to problem
First name
Kian
Country
India
Age
11
5+3
