Find the value of x?
{15,7,11,23,19,x}
1)the sequence are in arithmetic progression.
2)x is prime number

• from the first statement value of x can be 3 or 27 and from second we know that x is prime so the only answer is x=3.hence both statement are required.
  
• 10 years agoHelpfull: Yes(27) No(6)
• Either Of the options are unable to give solution..
  option 1 says about AP.. but ther is no AP Series
  Option 2 says X prime number that also isn't enough to find the number
• 10 years agoHelpfull: Yes(11) No(4)
• WHY NOT IN AP...I CAN SEE 7,11,15,19 AND 23 WITH CD=4@RICHA NAD PRANOY
• 10 years agoHelpfull: Yes(7) No(3)
• the given series in not in a.p hence ans couldn't be calculated
• 10 years agoHelpfull: Yes(3) No(0)
• 1st can give answer
  Second can not
• 10 years agoHelpfull: Yes(3) No(5)
• can we change the sequence of terms in a.p. in which book it is written?
• 10 years agoHelpfull: Yes(3) No(1)
• 3
  the comman difference is 4, we have to possibility for x, 3 and 27
  3 is the prime number and 27 is not
  so answer is 3
• 10 years agoHelpfull: Yes(2) No(1)
• sort the given numbers
  ?,7,11,15,19,23,?
  so there is two possibility to maitain series
  either 3 or 27
  
  acc. to 2 statement number is prime then number=3
  both are required
  
• 10 years agoHelpfull: Yes(2) No(0)