Which 13

Which numbers are perfectly divisible by 3? 45,904 40,404 145,083 16,674 75,035 (use sum of digits)

Correct answer:

a1 =  40404
a2 =  145083
a3 =  16674

Step-by-step explanation:

x1=45904 x2=40404 x3=145083 x4=16674 x5=75035  s1=4+5+9+0+4=22 s11=2+2=4  s2=4+0+4+0+4=12 s22=1+2=3  s3=1+4+5+0+8+3=21 s33=2+1=3  s4=1+6+6+7+4=24 s44=2+4=6  s5=7+5+0+3+5=20 s55=2+0=2  x1,x5 not÷3 a1=x2=40404

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