If PIG is coded as 1697, then what will be the code for GOAT?

A solid cube of 4 inches has been painted Red, Green, and Black on pair of opposite faces. It has been cut into one-inch cubes. How many cubes have only one face painted that too only red? 

583 : 483 : : 293 : ?

If 25 A 9 B 3=75 and 15 A 6 B 2=45, then 16 A 8 B 2=?

If PENCIL is coded as ? @ , = ; 7 and PAPER is coded as ? 9 ? @ 5 how will you code CLIP? 

In a school, the bell is rung once after each half an hour. The school starts at 8:00 a.m. and closes at 1: 30 p.m. The bell is rung 3 times continuously, at the time of beginning, at the time of lunch break at 10:00 and 10:30 a.m. and at the end. How many times is the bell rung every day? 

Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
_sr_tr_srs_r_srst_

Out of 100 families in the neighbourhood, 50 members have radios , 75 members have TVs and 25 members have VCRs . Only 10 families have all three and each VCR owner also has a TV . If some families have radio only , how many have only TV ?