How many numbers in between the 1 to 100 whose factors will be prime ie like 3= 1,3 ?

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• 10 years agoHelpfull: Yes(16) No(1)
• @ANSHUL SHRIVASTAVA nahi bhai actual me internet connection slow tha aur ak bar mai submit kiya to nahi hua to kai bar submit kar diya phir bad me dekha 19 bar ho gya aur phir delete ka koi optiion phi nahi tha .sorry for this.........BHAVNAO ko samjho bhai.
• 10 years agoHelpfull: Yes(6) No(2)
• what to prepare for 23rd nov elitmus paper??
• 10 years agoHelpfull: Yes(4) No(3)
• answer will be 100
  because factors of any no is a prime no.
• 10 years agoHelpfull: Yes(4) No(7)
• 3^2=9
  factor of nine=9, 3, 1
  9 is not a prime number
  so there must be only 25
• 9 years agoHelpfull: Yes(4) No(1)
• its an easy one.. all numbers have prime no as their factors like 9 has(3,3) which is a prime number 42 has (7,2,3) all are prime so 1-100 has 99 such numbers except 1 coz 1 is not prime no..
• 9 years agoHelpfull: Yes(4) No(2)
• answer:54
  prime number b/w 1to 100 =25
  2*3;2*5;2*7...................2*47
  3*5;3*7.........3*31
  5*7.....5*19
  7*11
  above all have prime factors
  so 25+29=54
• 9 years agoHelpfull: Yes(4) No(2)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(2) No(1)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(2) No(0)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(2) No(1)
• welll 35 is one exception which has 5,7 prime factors its neither square nor prime. many such exceptions 33,55,77,99,6,14,.... cant really count! :X
• 10 years agoHelpfull: Yes(2) No(0)
• 25 numbers
• 10 years agoHelpfull: Yes(1) No(1)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(1) No(2)
• 32 = 25 prime no. + 7 sqr
• 10 years agoHelpfull: Yes(1) No(1)
• 32 = 25 prime no. + 7 sqr
• 10 years agoHelpfull: Yes(1) No(0)
• agree with prashant....check out pls...
• 10 years agoHelpfull: Yes(1) No(0)
• 25 numbers will be consist between 1 to 100 .
• 10 years agoHelpfull: Yes(1) No(0)
• There are 26 prime nos. in between 1to100(including 1) As given in question (prime i.e like 3= 1,3)
  and A prime number has exactly two factors, 1 and itself.
  A/C to question , how many nos. in between the 1 to 100 whose factors are prime
  So, All the nos. between 1 to 100 has a prime factor(i.e 2,3,5,7,11,13,17etc)
  So ans will be definitely 100.
  
  
  
• 9 years agoHelpfull: Yes(1) No(0)
• 38 is the answer because 15,75,69,21,39,63 are also possible except prime number and their sqare
• 9 years agoHelpfull: Yes(1) No(0)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(0) No(1)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(0) No(1)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(0) No(0)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(0) No(0)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(0) No(0)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(0) No(0)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(0) No(0)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(0) No(0)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(0) No(1)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(0) No(0)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(0) No(0)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(0) No(1)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(0) No(1)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(0) No(1)
• Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.
• 10 years agoHelpfull: Yes(0) No(2)
• 32 = 25 prime no. + 7 sqr
• 10 years agoHelpfull: Yes(0) No(0)
• from 1-100 there is 25 prime number.
• 10 years agoHelpfull: Yes(0) No(0)
• (100-1)/3 = 33
• 9 years agoHelpfull: Yes(0) No(2)
• 3 5 7 11 13 17 19 23 29 31 37 41 43 47 51 53 59 61 67 71 73 79 83 91 97
  
  26 is ans
• 9 years agoHelpfull: Yes(0) No(7)
• by counting 25
• 9 years agoHelpfull: Yes(0) No(0)
• 3 5 7 11 13 17 19 23 29 31 37 41 43 47 51 53 59 61 67 71 73 79 83 91 97
  after counting ans is 25
• 9 years agoHelpfull: Yes(0) No(5)
• Answer is 26 including 2 bcoz 2 is also a prime no.
• 9 years agoHelpfull: Yes(0) No(3)
• 1 to 10
  2 3 5 7
  10to 20
  11 13 17
  20 to 30
  23 29
  30to40
  31 37
  '
  '
  '
  '
  90to 100
  only99
  so ans is 22
  
• 9 years agoHelpfull: Yes(0) No(2)
• 25
  from 1 to 100 only 25 prime no are present
• 9 years agoHelpfull: Yes(0) No(0)
• Prime factor-a no whose only factor are 1and itself.
  2,3,5,7,11..........
  Total no is 26.
• 9 years agoHelpfull: Yes(0) No(3)
• in question the example is given 3=1*3,
  but the point is 1 is not a prime number...so exclude the 25 prime numbers at first
• 7 years agoHelpfull: Yes(0) No(0)
• Plzz its a request not to give incorrect ans here if not sure about it ...
  Ans is 100
  becoz factor of any no. is prime only.
• 7 years agoHelpfull: Yes(0) No(0)
• all the prime numbers which 25 not square if u taking square like 9 25 16 so factor for eg
  for 9 factor will be 1,3,9
  25 =1,5,25 so 9 25 16 any square its not prime number.
• 7 years agoHelpfull: Yes(0) No(0)
• 25 prime no. + 7 sqr (2^2,2^4,2^6,3^2,3^4,5^2,7^2)
  (2^2,2^4,2^6,3^2,3^4,5^2,7^2) The factors of these are also gives prime factor.
  So answer is 32
• 2 years agoHelpfull: Yes(0) No(0)