reasoning · 2026-10-05

In 10 years, John will be twice as old as he was 5 years ago. How old is John right now?

Answer: c

Let J be his current age. The equation is J + 10 = 2 * (J - 5). This expands to J + 10 = 2J - 10. Solving for J gives J = 20.

Model answers

• gpt-oss-20b (openai/gpt-oss-20b): c
• qwen-3-8-27b (qwen/qwen3.8-27b): c
• nemotron-3-super (nvidia/nemotron-3-super-120b-a12b:free): c
• gemini-3-8-flash (gemini-3.8-flash-low): c
• gemini-3-1-pro (gemini-3.1-pro-high): c
• claude-opus-4-6 (claude-opus-4-6-thinking): c