15, 25, 35, __, 65, 85
a. 40
b. 45
c. 55
d. 60

• 3*5=15
  5*5=25
  7*5=35
  11*5=55
  13*5=65
  17*5=85
  prime numbers is multiplied by 5 so ans is c.55
• 10 years agoHelpfull: Yes(3) No(0)
• all are multiple of 5 with pime number
  ans is c.55
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• 55 coz all are prime multiples of 5
  i mean 3,5,7,11,13,17 multiplies by 5 gives the series
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• the sequence is prime numbers are multiflywith 5
  5(3,5,7,11,13,17)=5*11
  55
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• 3*5=15
  5*5=25
  7*5=35
  11*5=55
  13*5=65
  17*5=85
  
  so ans is 55
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• 55 is the answer
• 9 years agoHelpfull: Yes(0) No(0)