13 2dDi dalam Buku Mimpi 13 Berisikan simbol dari Penjaga Pintu – Gajah – Lari Estafet – Kipas Angin – Cuci Rambut – Sarang Burung – Keris, sertaOn putting A=0 and B=13, we can get 13. On putting D=0 and B=13 in eqn (2), we can still get 13. Thus, we can say that the value of D cannot be determed from the given data.