On a mountain adventure, Emek and Luna needed to build a bright rescue signal. They arranged stones in rows. The first row had 7 stones, the second had 9, and the third had 11. Emek saw that each new row grew by 2 stones. The signal needed 6 rows, so Luna predicted 13, 15, and 17 stones for the next three rows. They gathered the right number, completed the pattern, and soon their bright signal could be seen from far away.
Challenges
Challenge 1 of 5
Challenges
Challenge 1 of 4
Hint
Compare the number of stones in one row with the next row.
Luna says the row pattern is 7, 9, 11, 13, 15, 17. Which statement best checks that her pattern is correct?
Each row has 1 more stone than the row before itEach row has 2 more stones than the row before itEach row has 3 more stones than the row before itEach row has 2 fewer stones than the row before itCorrect! The number of stones increases by 2 in every new row.
Try again. Check the change from 7 to 9 and from 9 to 11.
Next🎉 Congrats! You got this question!
Hint
The sixth row has 17 stones. Continue the pattern one more time.
Suppose Emek and Luna add a seventh row to the rescue signal and continue the same pattern. How many stones should be in the seventh row?
Correct! The seventh row should have 19 stones.
Try again. Add 2 to the number of stones in the sixth row.
Next🎉 Congrats! You got this question!
Hint
The pattern should increase by 2 each time.
Emek accidentally writes 7, 9, 11, 14, 15, 17 for the 6 rows. Which number does not follow the rescue signal pattern?
9111417Correct! After 11, the next number should be 13, not 14.
Try again. Check each number by adding 2 to the one before it.
Next🎉🎉🎉🎉🎉🎉🎉🎉
🎉 Congrats! You finished this challenge set!
