Which compound prefix is not allowed in SI?

Which way of writing a force value follows SI rules?

Which instrument is most suitable for measuring the length of a classroom?

The result of (8 x 10^6)/(2 x 10^2) is:

A ruler reading viewed from point A instead of directly above point B will most likely contain:

The result of (2 x 10^3)(4 x 10^2) is:

Ten Vernier divisions occupy 9 mm. The length of one Vernier division is:

0.00081 in scientific notation is:

If one main-scale division is 1 mm and one Vernier division is 0.9 mm, the least count is:

7.2 x 10^5 written in ordinary notation is:

Which jaws of Vernier callipers measure the external diameter of a sphere?