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What is UKIMO?

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The UKMT (the host) runs a series of mathematics challenges to encourage child's interest in mathematics and develop their skills in schools. The three main challenges are:

Challenge date: 22 March 2024, 7-9pm

Closing date of registering: 15 March 2024

When registering multiple students, complete a separate registration form for each student, and ensure that you use a different email for each student.

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The top-scoring 50% of participants will get Bronze, Silver and Gold certificates in the ratio of 3:2:1, and UKIMO is the follow-on round to UKIMC. 

How does the competition work?

UKIMO is sat by the top 500 scorers from each school year (year 9, year 10 and year 11) in the Intermediate Maths Challenge and consists of three papers. 'Cayley', 'Hamilton' and 'Maclaurin' are named after famous mathematicians.

The paper the student will undertake depends on the year group that the student is in NZ Year 9-11.

- Cayley: NZ Year 9 and below

- Hamilton: NZ Year 10

- Maclaurin: NZ Year 11

Fees for the UKIMO (all-year level) are $100 or $200 per student (please see below*).

Eligible year groups: Year 9-11

Exam: Online

Exam duration: 2 hours

Calculators are NOT permitted.


Name of Account: Pinnacle Education Group

Account: 06-0241-0684634-00


Please make payment with the students 'full name + UKIMO ' as reference.

⚠️ Please note that any fees and payments made are non-refundable.

⚠️ Before you make any payment, make sure you read through the refund policy on our website to avoid misunderstandings.

(Terms and conditions apply).

Please note: If you registered after the deadline, the fees will be doubled.

If you attended UKIMC: qualified students of UKIMC will receive a formal invitation to the follow-on round (such as UKIMO)! 

This invitation will specify which follow-on round you have qualified for and the date it will take place. 

*If you attended UKIMC and have qualified for UKIMO, the entry fee is $100. If you are not qualified for UKIMO, the entry fee is $200. 

PGA reserves the right to interpret all competition and course arrangements.

Competition format

Each paper contains six questions. Each question is worth 10 marks, and the total mark is 60.


Each solution is marked out of 10 on a 0+ and 10- scale; that is to say, if an answer is judged incomplete or unfinished, it is awarded a few marks for progress and relevant observations, whereas if it is presented as complete and correct, marks are deducted for faults, poor reasoning, or unproven assumptions.

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Each qualifying student receives a Certificate of Qualification or Participation depending on their entry route. 


The highest-scoring participants each receive Certificates of Distinction and Merit.


Each of the top 20 scorers receive a gold medal, the next 30 a silver medal and the next 50 a bronze medal. 


All medalists will also be awarded a book prize; the title varies from year to year.

The 2023 award thresholds were:

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