Puzzles on Metre and Its Conversions
Puzzle 1
How many millimetres (mm) are there in 1 metre?
Hint: 1 mm is one-thousandth of a metre.
Answer: 10³ mm.
Puzzle 2
How many centimetres (cm) are there in 1 metre?
Hint: 1 cm is one-hundredth of a metre.
Answer: 10² cm.
Puzzle 3
How many nanometres (nm) are there in 1 metre?
Hint: 1 nm is one-billionth of a metre.
Answer: 10⁹ nm.
Puzzle 4
How many microns (µm) are there in 1 metre?
Hint: 1 micron is one-millionth of a metre.
Answer: 10⁶ µm.
Puzzle 5
How many kilometres (km) are there in 1 metre?
Hint: 1 km is 1000 metres.
Answer: 10⁻³ km.
Puzzle 6
How many metres are there in 1 light-second?
Hint: Light travels at 3 × 10⁸ m/s.
Answer: 3 × 10⁸ m.
Puzzle 7
How many metres are there in 1 light-minute?
Hint: 1 light-minute = 60 light-seconds.
Answer: 1.8 × 10¹⁰ m.
Puzzle 8
How many metres are there in 1 light-year?
Hint: Light travels 9.461 × 10¹² km in a year.
Answer: 9.461 × 10¹⁵ m.
