three - the first being 5 then 4 and 6 the noughts (0) dont meen anything in maths - they are just a place holder - in this number they arnt even needed!
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3 significant figures.
There are 4 significant figures in this number.
There are 3 significant figures in this number.
There are 2 significant figures in this number.
There are 3 significant figures in this number.