Question

S1 is a series of 5 consecutive multiples of 3 and S2 is a series of 4 consecutive multiples of 8. If the ratio of 3rd to 2nd terms in S1 is 6:5 and in S2 is 5:4, what is the sum of the first digits of S1 and S2?

A 28
B 24
C 30
D 36
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