Practical Mathematics K11Planets orbit around the Sun:
Mercury 3 Earth months;
Venus 7 Earth months;
Earth 1 Earth year (365.25 days);
Mars 23 Earth months. Almost 2 Earth years;
Jupiter 142 Earth months. Almost 12 Earth years;
Saturn 354 Earth months. (29.5 Earth years);
Uranus 1009 Earth months. (84 Earth years);
Neptune 1979 Earth months (almost 165 Earth years);
Pluto 2977 Earth months (248 Earth years);

Gerry the Astronaut lived 25 years on the Earth, traveled 3 years to Mars, lived there for 12 Mars years, and traveled back to the Earth.

How old is he now?