Number Sense Challenge Leaderboard

Here are the standings for Number Sense Challenge. Cumulative scores are calculated for each 10-week Challenge based on the top 8 scores from each participant.

Prizes will be distributed at the end of the Challenge based on cumulative results over the 10-week Challenge.

October-December 2025 cumulative leaderboard

• Test 126N2A (October 2)
• Test 126N2B (October 9)
• Test 126N2C (October 16)
• Test 126N2D (October 23)
• Test 126N2E (October 30)
• Test 126N2F (November 6)
• Test 126N2G (November 13)
• Test 126N2H (November 20)
• Test 126N2I (December 4)
• Test 126N2J (December 11)

July-September 2025 cumulative leaderboard

• Test 126N1A (July 10)
• Test 126N1B (July 17)
• Test 126N1C (July 24)
• Test 126N1D (July 31)
• Test 126N1E (August 7)
• Test 126N1F (August 14)
• Test 126N1G (August 21)
• Test 126N1H (August 28)
• Test 126N1I (September 4)
• Test 126N1J (September 11)

April-June 2025 cumulative leaderboard

• Test 125N4A (April 3)
• Test 125N4B (April 10)
• Test 125N4C (April 17)
• Test 125N4D (April 24)
• Test 125N4E (May 1)
• Test 125N4F (May 8)
• Test 125N4G (May 15)
• Test 125N4H (May 22)
• Test 125N4I (May 29)
• Test 125N4J (June 5)

January-March 2025 cumulative leaderboard

• Test 125N3A (January 2)
• Test 125N3B (January 9)
• Test 125N3C (January 16)
• Test 125N3D (January 23)
• Test 125N3E (January 30)
• Test 125N3F (February 6)
• Test 125N3G (February 13)
• Test 125N3H (February 20)
• Test 125N3I (February 27)
• Test 125N3J (March 6)

October-December 2024 cumulative leaderboard

• Test 125N2A (October 3)
• Test 125N2B (October 10)
• Test 125N2C (October 17)
• Test 125N2D (October 24)
• Test 125N2E (October 31)
• Test 125N2F (November 7)
• Test 125N2G (November 14)
• Test 125N2H (November 21)
• Test 125N2I (December 5)
• Test 125N2J (December 12)

July-September 2024 cumulative leaderboard

• Test 125N1A (July 11)
• Test 125N1B (July 18)
• Test 125N1C (July 25)
• Test 125N1D (August 8)
• Test 125N1E (August 15)
• Test 125N1F (August 22)
• Test 125N1G (August 29)
• Test 125N1H (September 5)
• Test 125N1I (September 12)
• Test 125N1J (September 19)

April-June 2024 cumulative leaderboard

• Test 124N4A (April 4)
• Test 124N4B (April 11)
• Test 124N4C (April 18)
• Test 124N4D (April 25)
• Test 124N4E (May 2)
• Test 124N4F (May 9)
• Test 124N4G (May 16)
• Test 124N4H (May 23)
• Test 124N4I (May 30)
• Test 124N4J (June 6)

January-March 2024 cumulative leaderboard

• Test 124N3A (January 4)
• Test 124N3B (January 11)
• Test 124N3C (January 18)
• Test 124N3D (January 25)
• Test 124N3E (February 1)
• Test 124N3F (February 8)
• Test 124N3G (February 15)
• Test 124N3H (February 22)
• Test 124N3I (February 29)
• Test 124N3J (March 7)

October-December 2023 cumulative leaderboard

• Test 124N2A (October 5)
• Test 124N2B (October 12)
• Test 124N2C (October 19)
• Test 124N2D (October 26)
• Test 124N2E (November 9)
• Test 124N2F (November 16)
• Test 124N2G (November 30)
• Test 124N2H (December 7)
• Test 124N2I (December 14)
• Test 124N2J (December 21)

July-September 2023 cumulative leaderboard

• Test 124N1A (July 6)
• Test 124N1B (July 13)
• Test 124N1C (July 20)
• Test 124N1D (July 27)
• Test 124N1E (August 10)
• Test 124N1F (August 17)
• Test 124N1G (August 24)
• Test 124N1H (August 31)
• Test 124N1I (September 7)
• Test 124N1J (September 14)

April-June 2023 cumulative leaderboard

• Test 123N4A (April 6)
• Test 123N4B (April 13)
• Test 123N4C (April 20)
• Test 123N4D (April 27)
• Test 123N4E (May 4)
• Test 123N4F (May 11)
• Test 123N4G (May 18)
• Test 123N4H (May 25)
• Test 123N4I (June 1)
• Test 123N4J (June 8)

January-March 2023 cumulative leaderboard

• Test 123N3A (January 12)
• Test 123N3B (January 19)
• Test 123N3C (January 26)
• Test 123N3D (February 2)
• Test 123N3E (February 9)
• Test 123N3F (February 16)
• Test 123N3G (February 23)
• Test 123N3H (March 2)
• Test 123N3I (March 9)
• Test 123N3J (March 16)

October-December 2022 cumulative leaderboard

• Test 123N2A (October 6)
• Test 123N2B (October 13)
• Test 123N2C (October 20)
• Test 123N2D (October 27)
• Test 123N2E (November 10)
• Test 123N2F (November 17)
• Test 123N2G (December 1)
• Test 123N2H (December 8)
• Test 123N2I (December 15)
• Test 123N2J (December 22)

July-September 2022 cumulative leaderboard

• Test 123N1A (July 7)
• Test 123N1B (July 14)
• Test 123N1C (July 21)
• Test 123N1D (July 28)
• Test 123N1E (August 4)
• Test 123N1F (August 11)
• Test 123N1G (August 18)
• Test 123N1H (August 25)
• Test 123N1I (September 1)
• Test 123N1J (September 8)

April-June 2022 cumulative leaderboard

• Test 122N4A (April 7)
• Test 122N4B (April 14)
• Test 122N4C (April 21)
• Test 122N4D (April 28)
• Test 122N4E (May 5)
• Test 122N4F (May 12)
• Test 122N4G (May 19)
• Test 122N4H (May 26)
• Test 122N4I (June 2)
• Test 122N4J (June 9)

January-March 2022 cumulative leaderboard

• Test 122N3A (January 13)
• Test 122N3B (January 20)
• Test 122N3C (January 27)
• Test 122N3D (February 3)
• Test 122N3E (February 10)
• Test 122N3F (February 17)
• Test 122N3G (February 24)
• Test 122N3H (March 3)
• Test 122N3I (March 10)
• Test 122N3J (March 17)

October-December 2021 cumulative leaderboard

• Test 122N2A (October 7)
• Test 122N2B (October 14)
• Test 122N2C (October 21)
• Test 122N2D (October 28)
• Test 122N2E (November 4)
• Test 122N2F (November 11)
• Test 122N2G (November 18)
• Test 122N2H (December 2)
• Test 122N2I (December 9)
• Test 122N2J (December 16)

July-September 2021 cumulative leaderboard

• Test 122N1A (July 8)
• Test 122N1B (July 15)
• Test 122N1C (July 22)
• Test 122N1D (July 29)
• Test 122N1E (August 5)
• Test 122N1F (August 12)
• Test 122N1G (August 19)
• Test 122N1H (August 26)
• Test 122N1I (September 2)
• Test 122N1J (September 9)

April-June 2021 cumulative leaderboard

• Test 121N4A (April 1)
• Test 121N4B (April 8)
• Test 121N4C (April 15)
• Test 121N4D (April 22)
• Test 121N4E (April 29)
• Test 121N4F (May 6)
• Test 121N4G (May 13)
• Test 121N4H (May 20)
• Test 121N4I (May 27)
• Test 121N4J (June 3)

January-March 2021 cumulative leaderboard

• Test 121N3A (January 7)
• Test 121N3B (January 14)
• Test 121N3C (January 21)
• Test 121N3D (January 28)
• Test 121N3E (February 4)
• Test 121N3F (February 11)
• Test 121N3G (February 18)
• Test 121N3H (February 25)
• Test 121N3I (March 4)
• Test 121N3J (March 11)

October-December 2020 cumulative leaderboard

• Test 121N2A (October 8)
• Test 121N2B (October 15)
• Test 121N2C (October 22)
• Test 121N2D (October 29)
• Test 121N2E (November 5)
• Test 121N2F (November 12)
• Test 121N2G (November 19)
• Test 121N2H (December 3)
• Test 121N2I (December 10)
• Test 121N2J (December 17)

July-September 2020 cumulative leaderboard

• Test 121N1A (July 23)
• Test 121N1B (July 30)
• Test 121N1C (August 6)
• Test 121N1D (August 13)
• Test 121N1E (August 20)
• Test 121N1F (August 27)
• Test 121N1G (September 3)
• Test 121N1H (September 10)
• Test 121N1I (September 17)
• Test 121N1J (September 24)