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1001 to 1005.
Welcome!
Choose a mini-round to practice today's skills.
Mini-Sprint Round
5 problems โข 7 minutes. Builds mental math speed and stamina under time pressure.
Mini-Target Round
2 problems (1 pair) โข 6 minutes. Deep multi-step reasoning and geometry problems.
Mini-Team Round
3 problems โข 8 minutes. Challenging synthesis, casework, and multi-concept team problems.
Countdown Blitz
5 rapid-fire questions โข 45 seconds each. Instant pattern recognition and speed tricks.
Fix My Misses
Redo problems you missed in past rounds until you achieve 100% mastery.
Starred Study Deck
Practice problems you bookmarked with a star during workouts or skill ramping.
๐๏ธ Custom Study & Practice Session Builder
Filter by competition round, difficulty tier (#1โ10 Warmup, #11โ20 Core, #21โ30 Stretch), and toggle Untimed Zen Mode for instant per-question solution checking.
1-Click Timed Topic Drills (5 Problems โข 8 Mins)
Personal Mistake Notebook
0 MissedReview problems you previously missed. Enter the correct answer to master them and clear them from your review deck!
Number Sense & Automaticity Dojo
60-Second BlitzTop Sprint & Countdown competitors don't calculate $17^2$, $\frac{5}{8}$, or $24^2$ โ they recall them instantly. Train your automaticity reflex here!
Ready for a 60-Second Automaticity Sprint?
Answers auto-submit the instant you type the right digits โ no need to press Enter! See how many you can chain in 60 seconds.
๐ MATHCOUNTS Must-Memorize Number Sense Reference Sheet
2โถ=64 โข 2โท=128 โข 2โธ=256 โข 2โน=512 โข 2ยนโฐ=1024
5!=120 โข 6!=720 โข 7!=5040 โข 8!=40320
(20, 21, 29) โข (9, 40, 41) โข (12, 35, 37) โข (11, 60, 61)
โข $a \times 11$: Sum adjacent digits (e.g. $43 \times 11 = 473$)
โข $1001 = 7 \times 11 \times 13$: $\overline{abc} \times 1001 = \overline{abcabc}$
Starred Problems Study Deck
0 StarredSave tricky problems or favorite techniques with the โญ Star button during any workout or skill module to build your personal pre-contest review deck.
Step-by-Step Worked Explanation:
Score: 4 / 5 (80%)
Completed in 4 minutes, 12 seconds
Coach Command Center
MATHCOUNTS Team Progress, Skill Ramping Badges & Weakness Analytics
Roster Activity & Skill Ramping Medals
| PIN | Handle / Name | Sessions | Accuracy | Skill Ramping Badges | Last Active |
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