Latest Elitmus Aptitude Question SOLUTION: How many numbers in between the 1 to 100 whose factors will be prime ie like 3= 1,3 ?

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(#M40051283) ELITMUS Numerical Ability question Keep an EYE

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

Asked In Elitmus suryakant (9 years ago)

Unsolved Read Solution (48)

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Read Solution (48) :

Anshul Shrivastava  (9 years ago)

@ajay singh bhai lagta h BHAVNAO me behgaye h.....

Is this solution Helpfull? Yes (16) | No (1)  

Ajay Singh  (9 years ago)

@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.

Is this solution Helpfull? Yes (6) | No (2)  

Neha Shende  (9 years ago)

what to prepare for 23rd nov elitmus paper??

Is this solution Helpfull? Yes (4) | No (3)  

prashant singh  (9 years ago)

answer will be 100
because factors of any no is a prime no.

Is this solution Helpfull? Yes (4) | No (7)  

vikas kumar singh   (9 years ago)

3^2=9
factor of nine=9, 3, 1
9 is not a prime number
so there must be only 25

Is this solution Helpfull? Yes (4) | No (1)  

sheikh shahrukh  (9 years ago)

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..

Is this solution Helpfull? Yes (4) | No (2)  

ABHINAY VERMA  (8 years ago)

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

Is this solution Helpfull? Yes (4) | No (2)  

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes (2) | No (1)  

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes (2) | No   

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes (2) | No (1)  

Parag  (9 years ago)

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

Is this solution Helpfull? Yes (2) | No   

Richa Gupta  (9 years ago)

25 numbers

Is this solution Helpfull? Yes (1) | No (1)  

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes (1) | No (2)  

Chirag Ranjan Lahiri  (9 years ago)

32 = 25 prime no. + 7 sqr

Is this solution Helpfull? Yes (1) | No (1)  

Chirag Ranjan Lahiri  (9 years ago)

32 = 25 prime no. + 7 sqr

Is this solution Helpfull? Yes (1) | No   

maharaja  (9 years ago)

agree with prashant....check out pls...

Is this solution Helpfull? Yes (1) | No   

HARIOM TIWARI  (9 years ago)

25 numbers will be consist between 1 to 100 .

Is this solution Helpfull? Yes (1) | No   

parash  (8 years ago)

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.

Is this solution Helpfull? Yes (1) | No   

ANKESH SINGH  (8 years ago)

38 is the answer because 15,75,69,21,39,63 are also possible except prime number and their sqare

Is this solution Helpfull? Yes (1) | No   

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes | No (1)  

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes | No (1)  

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes | No   

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes | No   

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes | No   

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes | No   

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes | No   

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes | No   

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes | No (1)  

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes | No   

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes | No   

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes | No (1)  

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes | No (1)  

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes | No (1)  

Ajay Singh  (9 years ago)

Ans 32 = 25 prime no. + 7 sqr . these have prime no. of factors.

Is this solution Helpfull? Yes | No (2)  

Chirag Ranjan Lahiri  (9 years ago)

32 = 25 prime no. + 7 sqr

Is this solution Helpfull? Yes | No   

srimugan  (9 years ago)

from 1-100 there is 25 prime number.

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swati priya  (9 years ago)

(100-1)/3 = 33

Is this solution Helpfull? Yes | No (2)  

RAJA  (9 years ago)

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

Is this solution Helpfull? Yes | No (7)  

RAJA  (9 years ago)

by counting 25

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SUBHAJYOTI KARMAKAR  (9 years ago)

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

Is this solution Helpfull? Yes | No (5)  

Rahul Ranjan  (9 years ago)

Answer is 26 including 2 bcoz 2 is also a prime no.

Is this solution Helpfull? Yes | No (3)  

mohit kumar tiwari  (8 years ago)

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

Is this solution Helpfull? Yes | No (2)  

vinay Kumar  (8 years ago)

25
from 1 to 100 only 25 prime no are present

Is this solution Helpfull? Yes | No   

aman kumar  (8 years ago)

Prime factor-a no whose only factor are 1and itself.
2,3,5,7,11..........
Total no is 26.

Is this solution Helpfull? Yes | No (3)  

Tejasvi Kumar  (7 years ago)

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

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rashmi negi  (7 years ago)

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.

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Adil khan  (6 years ago)

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.

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Digesh Singh Bisht  (1 year ago)

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

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