UPSC Government Jobs Exams Logical Reasoning Blood Relations

___+___+___=30, using 1,3,5,7,9,11,13,15

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UPSC Other Question

5+3+2=151012
9+2+4=183662
8+6+3=482466
5+4+5=202504
then
7+2+5=?
there is a tap and there is two bucket 5 and 7 litre ???ow i collect 1litre water