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Definitely COMPOSITE.

Remember ALL EVEN number end in (0,2,4,6,8) are Composite, because '2' is a factor of all EVEN numbers, thereby making them Composite/Compound.

NB Odd Number, ending in (1,3,5,7,9) can be either Composite or Prime, but NOT both.

Since '90' end in '0' then it is EVEN. It will divide by '2' , making it composite.

90/2 = 45

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lenpollock

Lvl 17
4d ago

What else can I help you with?