Yes, it is a multiple of 3.
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1131 is composite.
1131/200
Of 1131 pennies, x weigh 3.09 g and y weigh 2.51 g. In total, the 1131 pennies weigh 3001.8 g. 3.09x + 2.51y 1131 = 3001.8 I have no idea what to do after that, or if it's even right. I was thinking maybe dividing, but the number was so small it had to be wrong. Tell me, what grade is this for?
847 is composite.
27 is composite.