maths questions please 16 and 18 solve
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16.
Here the number can be written as
625/1000 after removing decimals
or 625/1000 = 25/40= 5/8
17.
2 ⁴√81 - 8 ³√216 + √225 - ⁴√16
= 2× ⁴√3⁴ - 8× ³√6³+ √15²- ⁴√2⁴
=2×3-8×6 + 15 - 2
= 6-48+15-2
= -29
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