A frog wants to jump backwards from 50. It continues to take jumps of 7. What is the number after which it is not possible for the frog to make a jump of 7?
Step 1: Start at 50, jump backwards by 7 Step 2: 50 - 7 = 43 Step 3: 43 - 7 = 36 Step 4: Continue: 29, 22, 15, 8, 1 Step 5: From 1, jumping back 7 would go to -6, which is not possible on the number track shown.
Answer: The number is 1. The frog cannot make a jump of 7 backwards from 1.
Explanation
The frog jumps backwards from 50 by 7: 50 → 43 → 36 → 29 → 22 → 15 → 8 → 1. From 1, a jump of 7 backwards would go below 0, which is not possible on the number track. So 1 is the last reachable number.
Solution Steps
Step 1: Start at 50, jump back by 7
Step 2: 50 - 7 = 43
Step 3: 43 - 7 = 36
Step 4: Continue: 29, 22, 15, 8, 1
Step 5: From 1, cannot jump back 7 (would go below 0)