Mathematical puzzle to train the programmer's brain Q01 "Palindrome in decimal"

Code

def kai(i): #Determine if it is a palindrome
    return str(i)[::-1] == str(i)
    
dec = 11
while not(kai(dec) and kai(bin(dec)[2:]) and kai(oct(dec)[2:])):
    dec += 2 #You only have to search for odd numbers (see text)
print(dec)

Supplement

n-ary

Binary 0bNN Eighth number 0oNN Hexagon 0xNN

Convert to binary bin (NN) Convert to octal number oct (NN) Convert to hexadecimal hex (NN)

Convert binary numbers to decimal numbers int (BIN, 2) Convert 8 to decimal int (OCT, 2) Convert hexadecimal to decimal int (HEX, 2)

Reverse the string

str[::-1]

Reference https://redcat-prog.hatenadiary.org/entry/20111104/1320395840