Question

how many years of development did it take before the wright brothers went from flying a glider to flying a powered airplane?
1
5

Explanation:

The Wright brothers began experimenting with gliders around 1900 - 1902 and achieved powered flight in 1903. The time from glider flights to powered airplane flight is about 1 - 3 years, with the closest option here being 1 (though more accurately around 2 - 3, but among the given options, 1 is the most probable in context of typical historical accounts' simplification). Wait, actually, the correct historical timeline: their glider experiments (successful glider flights) were in 1902, and powered flight in 1903, so the development time from glider to powered was about 1 year (from 1902 glider success to 1903 powered). So the correct option is the one with 1.

Answer:

1 (the option with "1")