There are numerous websites that have useful metric scale conversion charts that you can use to solve questions like this. One of which is at www.engineeringtoolbox.com/inches-mm-conversion-d_751.html

To solve this particular question you would approach it using the following steps:

1 inch = 25.4 millimeters,

1/4 inch = 1/4 x 25.4 =>6.35mm,

1 inch = 2.54 centimeters,

1/4 inch = 1/4 x 2.54 =>0.635cm,

1 inch = 0.0254 meters,

1/4 inch = 1/4 x0.0254 =>0.00635meters.

France was in fact the first country to adopt the metric scale in 1799 and it is now the basic system of measurement used in almost every country in the world; the United States being the only industrialised country yet to adopt the International System of Units as its predominant system of measurement.

Although the originators intended to devise a system that was equally accessible to all, it proved necessary to use prototype units under the custody of government or other approved authorities as standards.

From its beginning, the main feature of the metric system was the standard set of inter-related base units and a standard set of prefixes in powers of 10. These base units are used to derive larger and smaller units and replaced a huge number of un-standardised units of measure that existed previously. While the system was first developed for commercial use, its coherent set of units made it particularly suitable for scientific and engineering purposes.

To solve this particular question you would approach it using the following steps:

1 inch = 25.4 millimeters,

1/4 inch = 1/4 x 25.4 =>6.35mm,

1 inch = 2.54 centimeters,

1/4 inch = 1/4 x 2.54 =>0.635cm,

1 inch = 0.0254 meters,

1/4 inch = 1/4 x0.0254 =>0.00635meters.

France was in fact the first country to adopt the metric scale in 1799 and it is now the basic system of measurement used in almost every country in the world; the United States being the only industrialised country yet to adopt the International System of Units as its predominant system of measurement.

Although the originators intended to devise a system that was equally accessible to all, it proved necessary to use prototype units under the custody of government or other approved authorities as standards.

From its beginning, the main feature of the metric system was the standard set of inter-related base units and a standard set of prefixes in powers of 10. These base units are used to derive larger and smaller units and replaced a huge number of un-standardised units of measure that existed previously. While the system was first developed for commercial use, its coherent set of units made it particularly suitable for scientific and engineering purposes.