100,98,95,90,83

• answer is 72
  difference of successive two terms is prime number starting from 2
  100-98=2
  98-95=3
  95-90=5
  90-83=7
  so 11 is next prime number after 7
  hence 11 will deducted from 83
  83-11=72
• 12 years agoHelpfull: Yes(40) No(0)
• 100-2=98
  98-3=95
  95-5=90
  90-7=83
  83-11=72 hence answer is 72
• 12 years agoHelpfull: Yes(7) No(4)
• (first number-second number)
  => 100-98 = 2
  => 98-95 = 3
  => 95-90 =5
  => 90-83 =7
  => 83-72=11
  
  here the serial follow with 2,3,5,7,11
• 9 years agoHelpfull: Yes(0) No(0)
• it's successive subtraction of prime numbers so 83-11=72
• 5 years agoHelpfull: Yes(0) No(0)