Question

Replace the * with the smallest digit to make it divisible by 11

45*53

Divisbility Rule of 11 : The sum of the even digits is subtracted from the sum of the odd digits. The result is either 0 or divisible by 11.

Answer 1

Answer:

45053

A double complex or bicomplex is a diagram of shape ℤ≤×ℤ≤ (in some additive category): ⋮⋮↓∂v↓∂v⋯→Xn,m∂h→Xn−1,m→⋯↓∂v↓∂v⋯→Xn,m−1∂h→Xn−1,m−1→⋯↓∂v↓∂v⋮⋮ such that each row and each column is a complex (the differentials square to 0: ∂v∘∂v=0 and ∂h∘∂h=0) and such that all the squares commute