36
Njia:-
(1+1)x(1+1)=4
(2+2)x(2+2)=16
(3+3)x(3+3)=36 Kuna njia nyingine pia inaleta jibu 18,
11x11=121 halafu 1+2+1=4
22x22=484 halafu 4+8+4=16
33x33=1089 halafu 1+0+8+9=18
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