Find the Multiples Crossing
Hop a lantern beetle across an ash canal on moving iron barges. A sign asks which number is a multiple of 8—or 3, or 12. Land only on barges that match. A wrong number dumps you in the slag. Built for third- through fifth-grade multiples practice.
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How to Play Cinder Cross
Read the Factor
The bar at the top of the canal asks for a multiple of a number. In 24, 32, and 40 you have multiples of 8. In 18 you do not.
Hop Forward
Tap a barge in the next lane, press space or ↑, or use the hop button. Arrows or the side buttons step left and right.
Ride or Fall
A multiple holds. A miss drops you in the slag and costs a life. Ride the barge until the next hop.
Reach the Forge
Four lanes of barges, then the far bank. Eight crossings win. Three lives.
Key Features
Read the Sign
Each crossing names a factor. Example: which number is a multiple of 8?
Hop the Barges
Iron barges drift in opposite lanes. Tap one in the next lane, or use space and arrows. Only multiples are safe.
Near Misses
Decoys sit close to the truth—18 next to 24 when the factor is 8—so you check the skip count, not the look of the digits.
Eight Crossings
Reach the far forge eight times to win. Three dunks end the run. Best scores save per difficulty.
What is Cinder Cross?
Cinder Cross is a multiples crossing game. An ash canal holds moving iron barges labeled with numbers. A sign names a factor. The player hops a lantern beetle from barge to barge, landing only on multiples of that factor. The goal is eight crossings before three lives are spent.
Why Play Cinder Cross?
Skip Count Under Pressure
Barges move, so students check 8, 16, 24 while timing a hop—not on a static list.
Action, Not A-B-C
The answer is a place on the canal. You hop there. Play sits under the board.
Near-Miss Decoys
18 next to 24 trains the difference between “has an 8” and “is a multiple of 8.”
Grows With the Factor
Easy is 2, 5, and 10. Medium adds 3, 4, 6, and 8. Hard uses 7, 9, and 12.
Frequently Asked Questions
What is a multiple of 8?
A number you can make by skip-counting 8s: 8, 16, 24, 32, 40. 18 is not a multiple of 8.
How do I hop?
Tap a barge in the next lane, press space or the up arrow, or use the hop button under the canal. Left and right step sideways.
What if I land on the wrong number?
You fall in the slag and lose a life. Three falls end the run.
What do Easy, Medium, and Hard change?
The factors and how fast the barges drift. Easy stays with 2, 5, and 10.
What grade is this for?
Third through fifth grade (about ages 8–11). Stay on Easy for skip-counting by 2, 5, and 10.