45

1*2*3= 6
3*2=6
5*4*1=20
4*5=20

123 nearest square 11 then question the last digit is 3 (123) so 11*3=33-1(constantly subtract by1)ans 32 Same as 541 nearest square 23* last digit 1=23-1 you get the answer 22

3^3+2^2+1=32
1^3+4^2+5=22

134

54

22

Hii