Question

1+4=5
2+5=12
3+6=21
8+11=?

Answer 1

1+4=5
5+2+5=12
12+3+6=21
21+8+11=40

Answer 2

1×4 =4 ; 4+1=5......................... 2×5 =10 ; 10+2=12............................. 3×6 =18 ; 18+3=21........................... 4×7 =28 ; 28+4=32............................ 5×8 =40 ; 40+5=45............................ 6×9 =54 ; 54+6=60............................... 7×10 =70 ; 70+7=77.............................. 8×11 =88 ; 88+8=96................................. So, first we are multipling the numbers and then adding 1,2 and 3 and then so on................ Hope u understood the pattern now