Question

A,B,C and D finished coloring a picture in 3/4 hour 7/12 hour 5/8 hour and 6/7 hour respectively who among the following finished their coloring first
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Answer 1

A=3/4

B=7/12

C=5/8

D=6/7

Taking LCM of all

3/4, 7/12, 5/8, 6/7

126/168, 98/168, 105/168, 144/168

Therefore:

Among the following B (98/168) finished its coloring first.