X X X 7 X X X y X X X 8 X X
The fourteen digits of a credit card are to be written as shown above.
If the sum of every three consecutive digits is 18, then the value of y is :

a. 3
b. cannot be determined from the given information.
c. 2
d. 1

• Ans : A
  Explanation:
  Let us assume right most two X are a , b
  Then Sum of all the digits = 18 x 4 + a + b .......... (1)
  Also Sum of the X before 7 = 18
  Sum of the X between 7 & y = 18
  and sum of the X between y & 8 = 18
  So Sum of the 14 digit = 18 + 7 + 18 + y + 18 + 8 + a + b .....(2)
  Equating 1 and 2 we get y = 3
• 9 years agoHelpfull: Yes(58) No(4)
• y=3
  cuzz the number will be
  73873873873873
• 9 years agoHelpfull: Yes(9) No(2)
• sum of 14 digits of credit card is=18*4+x+y...eq1
  (assume the last two term will be x & z)
  now from above given question
  three digits before 7,sum=18
  three digits between 7 &y,sum=18
  three digits between y&8,sum=18
  and at last two no.-x,z(eq1)
  so18+7+18+y+18+8+x+z=72+x+z
  on solving above
  y=3
• 9 years agoHelpfull: Yes(5) No(1)
• 7+y+8=18
  thus, y=3
  
• 9 years agoHelpfull: Yes(4) No(0)
• DIGIT SHOULD BE LIKE THAT=
  82882882882882
  SO VALUE OF Y IS : 2
• 9 years agoHelpfull: Yes(2) No(12)
• its 73873873873873
  xxx7xxxyxxx8xx
  so...y is 3
• 9 years agoHelpfull: Yes(1) No(2)
• The correct option is (a). The answer is 3.
• 6 years agoHelpfull: Yes(1) No(0)
• Explanation:
  Let us assume right most two x and x are a , b
  Then Sum of all the digits = 18 x 4 + a + b .......... (1)
  Also Sum of the digits before 7 = 18
  Sum of the digits between 7, y = 18
  and sum of the digits between y , 8 = 18
  So Sum of the 14 digits = 18 + 7 + 18 + y + 18 + 8 + a + b (2)
  Equating 1 and 2 we get y = 3
• 9 years agoHelpfull: Yes(0) No(0)
• answer is 3
  because take xx7xx=xx7=7xx=18 and xx=11
  in 7xxx xx=11 and last x=7
  similarly for xx8xx xx=10
  in yxxx x=8 and xx=10
  xyx=18
  7+y+8=18
  y=3
• 9 years agoHelpfull: Yes(0) No(0)
• 3 ka multiple 12 so add first 12 and let last two is a and b respectvely so 18*4+a+b=credit card no then see 7 se phle teen digits he there sum is 18 after 7 3 digits unknown he dere sum is 18similarly y ka baad 18 8 ke baad a+b so this equation becomes 18+7+18+y+8+a+b,now 18*4+a+b ko iske sath equaate karo answer a jayega............
• 9 years agoHelpfull: Yes(0) No(1)
• ANSR:a because 7+y+8=18(already given)
  => 15+y=18 =>y=18-15 =>y=3
• 8 years agoHelpfull: Yes(0) No(0)
• let rightmost 2 be a and b
  4*18+a+b = 18+7+18+y+18+8+a+b
  =3
• 8 years agoHelpfull: Yes(0) No(0)
• 7+y+8=18
  y+15=18
  y=18-15=3
  Ans=3
• 4 years agoHelpfull: Yes(0) No(0)
• c
  because when we make a equation 11x+y=89 there is two variable in one equation
• 2 years agoHelpfull: Yes(0) No(0)