In the IT department of backrub, the administrator password is changed every month. The team of administrators, spread across the globe, receive an 8 digit number via email. This number is to be prefixed with a single digit number and suffixed with a single digit number to get the actual password. The password is divisible by 11 and 8. If the team received 65351364 this month, then which of the following pairs give prefix and suffix respectively.
a. 8, 9
b. 7, 8
c. 3, 4

• b is the answer
• 6 years agoHelpfull: Yes(9) No(0)
• 1. Apply divisibility rule of 8
  2. In the given options only b and c contains even suffix number
  3. Therefore 65351364 will become 653513648 (in case of opt b) or 653513644 (in case of opt c)
  4. consider opt b and apply divisibility rule of 11, it satisifies the rule hence the answer.
  
  ANS - OPTION B
• 6 years agoHelpfull: Yes(5) No(0)
• it could be option c) 3,4 because lcm of 11 and 8 is 88 the number must be divisible by 88 we have to use trial and error method to solve this question. only option c can satisfy
• 6 years agoHelpfull: Yes(1) No(1)
• for divisibility by 8, last 3 digits must be divisible by 8. By putting 65351364's last 2 digits 64 options suffix: 64 with 9, 64 with 8, 64 with 4, we get that 648 is divisible by 8.Thus (b) ans
• 5 years agoHelpfull: Yes(1) No(1)
• The password would be 8653513649
  
  8653513649 ÷ 11 = 786683059
  
  8653513649 ÷  8 = 1081689206 Remainder 1
  
  ⇒ Number cannot be divisible by 8
  
  
  Option b)
  
  The password would be 7653513648
  
  7653513648 ÷ 11 = 695773968
  
  7653513648 ÷  8 = 956689206
  
  ⇒ Number is both divisible by 8 and 11
  
  
  Option c)
  
  The password would be 3653513644
  
  3653513644 ÷ 11 = 332137604
  
  3653513644 ÷  8 = 456689205 Remainder 4
  
  ⇒ Number cannot be divisible by 8
  
  
  Option d)
  
  The password would be 2653513647
  
  2653513647 ÷ 11 = 241228513 Remainder 4
  
  2653513647 ÷  8 = 331689205 Remainder 7
  
  ⇒ Number cannot be divisible by 8 and 11
  
  
  Answer: (b) 7, 8
  
  Read more on Brainly.in - https://brainly.in/question/6617045#readmore
• 4 years agoHelpfull: Yes(1) No(0)
• b. 763513648/11
• 6 years agoHelpfull: Yes(0) No(1)
• b is the answer
• 6 years agoHelpfull: Yes(0) No(1)
• b is the anawers
• 6 years agoHelpfull: Yes(0) No(0)
• 7,8
  
  8 is divided by last 2 digits but 9 and 4 is not
• 1 year agoHelpfull: Yes(0) No(0)