91- 6303239042
Shiva
5y ago
1 + 2 = 21 2 + 3 =36 3 + 4 = 43 4 + 5 =? And it is not 54
2
Naren Karthi 5y ago
52
swagat 5y ago
58
1+2= 12+9 =21
2+3= 23+13 =36
3+4= 34+9 =43
therefore, 4+5= 45+13 =58
9 and 13 are used alternatively
