Question

ajutpr pls ex 13,si 14

Answer 1

(abcde - 100bc - de) :10^4 =5
100bc=bc00

abcde-
  bc00
      de 
----------
a0000
 Deci a0000 : 10000=5 => a=5

14)
ab+bc+ca =77
10a +b+10b+c+10c+a =77
11a+11b+11c=77
11(a+b+c) =77
a+b+c =77/11 =11

ab+bc+ca =121
10a+b+10b+c+10c+a=121
11a+11b+11c=121
11( a+b+c) =121
a+b+c =121/11=11

abc+cab+bca=444
100a+10b+c+100c+10a+b+100b+10c+a=444
111a+111b+111c=444
111(a+b+c) =444
a+b+c=444/111 =4

ab+ac+ba+bc+ca+cb=154
10a+b+10a+c+10b+a+10b+c+10c+a+10c+b=154
22a+22b+22c =154
22(a+b+c) =154
a+b+c=154/22 =7