Challenges & prizes
Play daily. Win monthly.
Sharpen your number sense with the free Daily Target puzzle, then enter the Monthly Number Challenge for prizes and a spot in the Hall of Fame.
Daily Target · new puzzle every day
Reach —
Use the numbers below (each at most once) with + − × ÷ and brackets to hit the target exactly.
🔥 Streak: 0
Monthly Number Challenge ·
Closes in
This month's prizes
| Place | Prize |
|---|---|
| 🥇 1st | $50 gift card + Hall of Fame |
| 🥈 2nd | $25 gift card + Hall of Fame |
| 🥉 3rd | $10 gift card + Hall of Fame |
| 🎖 Top 10 | Featured in The Weekly Number |
Prizes are funded by supporters & sponsors. Sponsor a bigger prize →
This month's challenge question
The 55993 problem: 55,993 = 7 × 19 × 421. Find the smallest five-digit number that is also the product of exactly three distinct primes, all of which are greater than 5 — and show your reasoning.
Correct answers with the clearest explanations are ranked by a panel; ties are broken by random draw using our public random number generator on a livestream or recorded video.
Rules (short version)
- Free to enter — no purchase necessary. One entry per person per month.
- Open worldwide where lawful; void where prohibited. Entrants under 18 need parental permission.
- Entries close at 23:59 (UTC) on the last day of the month.
- Winners are announced within 14 days and contacted by email; unclaimed prizes after 30 days roll over.
- Prizes are non-transferable; no cash alternative unless required by law. Full terms in our Terms of Use.
Submit your entry
🏆 Hall of Fame
The first monthly winners will be listed here. Your name could be first.