Emek, Luna, and Pixel reached a river filled with stepping stones numbered 1 to 18. A sign warned that only every second stone was safe. Pixel spotted the pattern: 2, 4, 6, 8. Luna knew they should keep counting by 2s. They followed 10, 12, 14, 16, and 18 across the river. By following the number pattern, everyone reached the other side safely.
Challenges
Challenge 1 of 5
Challenges
Challenge 1 of 4
Hint
The safe stone numbers go up by 2 each time.
Pixel sees the safe stones 2, 4, 6, 8. Which stone should Emek step on next?
9101112Correct! Counting by 2s after 8 gives 10.
Try again. Start at 8 and count forward by 2.
Next🎉 Congrats! You got this question!
Hint
The safe stones increase by 2 each time.
Luna is standing on safe stone 12. She moves forward to the next safe stone. What number is on that stone?
Correct! The next safe stone after 12 is 14.
Try again. Add 2 to 12 to find the next safe stone.
Next🎉 Congrats! You got this question!
Hint
Safe stone numbers follow the pattern 2, 4, 6, 8 and keep counting by 2s.
The safe stones are every second stone from 1 to 18. Which list shows only safe stones?
2, 5, 86, 9, 1210, 12, 1413, 15, 17Correct! 10, 12, and 14 are all in the safe pattern.
Try again. Look for a list where every number belongs to the counting-by-2s pattern.
Next🎉🎉🎉🎉🎉🎉🎉🎉
🎉 Congrats! You finished this challenge set!
