book Maths Puzzle Numerical Ability

Write the number in standard notation.

8 X 10^6

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book Other Question

Question

A square cardboard of side 20 m has a 4 m border round three of its side (very confusing ?) Find the area of the border.

Please help to answer this question. Thank you very much.
what is the next number?
32, 36, 9, 12, 4, 6, ...??