Grade 1 Math Puzzle 7: Simulate — and watch the ending

A free grade 1 math puzzle that teaches Simulate — and watch the ending. Try it first — the hint and the full solution open when you are ready.

Problem 7 · Simulate — and watch the ending · 5 points

Made by AI and not reviewed by a real person.

A frog starts on the ground below a 5-step staircase. Each jump takes it up 3 steps, but right after landing it slides down 1 step. The moment it touches step 5, it stops. How many jumps does it need?

Show a hint

Follow the frog jump by jump. Where is it after the first jump and slide?
On the last jump the frog stops right away — it does not slide back.

Show the answer and solution

Answer: D — 2

Jump 1: up to step 3, slides back to step 2. Jump 2: from step 2 it jumps to step 5 — goal reached, no slide! So 2 jumps. The trap is treating every jump the same: the last step of a process often behaves differently, so always simulate the ending carefully.

Grade 1 puzzle 7: Simulate — and watch the ending

Problem 7 · Simulate — and watch the ending · 5 points