350/7=50 (only sevens) OR 1 '77' and (50-11=39 sevens) --> total 40 terms
2 '77' and (50-22=23) --> 25 terms
3 '77' and (50-33=17) --> 20 terms
4 '77' and (50-44=6) --> 10 terms
out of the answer choices only 40 terms fit
IOM C
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7 OR 77 --> 7 OR 7*11
350/7=50 (only sevens) OR 1 '77' and (50-11=39 sevens) --> total 40 terms
2 '77' and (50-22=23) --> 25 terms
3 '77' and (50-33=17) --> 20 terms
4 '77' and (50-44=6) --> 10 terms
out of the answer choices only 40 terms fit
IOM C
350/7=50 (only sevens) OR 1 '77' and (50-11=39 sevens) --> total 40 terms
2 '77' and (50-22=23) --> 25 terms
3 '77' and (50-33=17) --> 20 terms
4 '77' and (50-44=6) --> 10 terms
out of the answer choices only 40 terms fit
IOM C