3. OWL Speed Math Championship

OWL Speed Calculation Championship 2025

The fastest mental calculators in Ostwestfalen-Lippe (OWL) are world-class!

On Saturday, June 14, 2025, about 30 winners traveled with their families from across OWL to Bielefeld City Hall.
The award ceremony took place there.
In the Grand Council Hall, their achievements were celebrated.
There were nice prizes and many friendly conversations.
Short math games provided extra fun.
The event ended with a buffet.

The Andreas Mohn Foundation and the Ravensberger Erfinderwerkstatt organized the championship for the third time on World Mathematics Day.
The goal of the event is to make math exciting and interesting.
Math helps us understand the world, solve problems, and develop new technologies.

From March 12, students could practice online.
The competition took place on March 26.
It was in English, and participants could calculate for 24 hours.
Each round lasted 1 minute, and children and teenagers could play up to 20 rounds.
Participants came from 81 countries.
They had to solve as many problems correctly and quickly as possible.
Worldwide, 51,928,073 problems were solved.
Teachers reported that the students had a lot of fun.

The speed calculators from OWL are world-class.
They often took the top three places in Germany.
Worldwide, among 228,958 participants, they were always in the top 1,000.

Especially strong performers were:

• Leonard Gisbrecht, Grade 2, Grundschule Milse – Rank 78

• Lukas Biele, Grade 7, Kreisgymnasium Halle – Rank 86

The Wellensiek Elementary School in Bielefeld had the most participants: 75 children.
The school received a special prize.

The students showed that mental calculation is still important today, even with calculators and mobile phones.
The organizers are already planning the next OWL Speed Calculation Championship.

A big thank you goes to:

• The parents who support their children

• The teachers who make participation possible

• The young calculation talents themselves

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OWL Speed Calculation Championship 2025 – Results

Grade 1:

• Timo Klöpperpieper – Buschkampschule – 336 points

• Louis Butterwegge – Grundschule Willebadessen – 374 points

• Benjamin Elia Schmidt – GS Wellensiek – 350 points

Grade 2:

• Leonard Gisbrecht – Grundschule Milse – 850 points – Rank 78 worldwide

• Johanna Bogner – Grundschule Milse – 577 points

• Joud Almasri – Grundschule Willebadessen – 531 points

Grade 3:

• Mira Dück – Grundschule Willebadessen – 645 points

• Oscar Demir – Grundschule Willebadessen – 635 points

• Tobias Horter – Grundschule Künsebeck – 602 points

Grade 4:

• Till Engelhardt – Grundschule Willebadessen – 709 points

• Liam Kölker – Grundschule Willebadessen – 663 points

• Lasse Hegemann – Grundschule Dreekerheide – 646 points

Grade 5:

• Pepe Rachner – Kreisgymnasium Halle – 847 points

• Robin Hörner – Kreisgymnasium Halle – 674 points

• Jannis Loheide – Kreisgymnasium Halle – 402 points

Grade 6:

• Lukas Biele – Kreisgymnasium Halle – 674 points – Rank 86 worldwide

• Zhenwei Liu – Evangelisches Gymnasium GT – 715 points

• Henrik Schmidt – Gymnasium St. Kaspar – 602 points

Grade 7:

• Finn Kiril – Widukind Gymnasium Enger – 274 points

• Martin Heyder – Widukind Gymnasium Enger – 231 points

• Matti Gepp – Widukind Gymnasium Enger – 216 points

Grade 8:

• Jacob Zeranka – Widukind Gymnasium – 307 points

Grade 9:

• Silas Schauties – Kreisgymnasium Halle – 524 points

Grade 10:

• Julius Halter – Kreisgymnasium Halle – 470 points

• Adrian Schmidt – Widukind Gymnasium – 467 points