The correct option is a (57)
For Ist circle problem,
= 3+3+4+5
= 15 x 2 (we multiple it by 2)
= 30
Now we multiple by (2) x 2 and subtract by -5 we get
= 30 - (2)2 - 5
= 30 - 9
= 21
Now we multiply by 3 we get
= 21 x 3
= 63 (given)
For 2nd circle problem,
= 8 + 4 +4 +3
= 19 x 2 (we multiple it by 2)
= 38
Now we multiple by (4) x 4 and subtract by -5 we get
= 38 - (4)4 - 5
= 38 - 21
= 17
Now we multiply by 3 we get
= 17 x 3
= 51 ( given)
For 3rd circle problem ,
= 9 + 7 + 5 +9
= 30 x 2 (we multiple it by 2)
= 60
Now we multiple by (6) x 6 and subtract by -5 we get
= 60 - (6)6 -5
= 60 -41
= 19
Now we multiply by 3 we get
= 19 x 3
= 57
