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Anonymous
the answer to 20 + 20 = 40
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the sum for 20 + 40 + 70 + 80 = 210
the sum of 10 + 10 = 20
100,000 + 20% = 120,000
int i, sum = 0; for (i=0; i<20; i+=2) sum+=i;
your answer is 20 ( 10+5=15+5=20)