Latest Elitmus Aptitude Question SOLUTION: A no n is not a prime no and 1

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(#M40152285) ELITMUS Numerical Ability question Number System Keep an EYE

A no n is not a prime no and 1

Asked In Elitmus NRJ Soni (8 years ago)

Solved Ritesh Kumar Read Solution (7)

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Ritesh Kumar  (8 years ago) Best Solution

multiplication of prime with itself or other prime gives non prime nos. so
11*11=121
11*13=143
11*17=187
11*19=209
11*23=253
11*29=319 which is not in range of 1-301 so we cant conider it
13*13=169
13*17=221
13*19=247
13*23=299
17*17=289
17*19=323 which is not in range of 1-301 so we cant conider it
So total possible nos are 10 and option c

Is this solution Helpfull? Yes (14) | No (1)  

NRJ Soni  (8 years ago)

A no n is not a Prime no and lies between1 to 301,how many no are which is not divisible by 2,3,5,7.
a)6
b)8
c)10
d)12

Is this solution Helpfull? Yes (10) | No   

JUGAL KHAJURIYA  (8 years ago)

Divisible is 2 = 150
Divisible is 3= 100
Divisible is 5 =60
Divisible is 7 = 43
The total prime number is 1 to 301 is 62
all common number is 291
may be ans is 10

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

Gulshan Kumar  (8 years ago)

multiplication of prime with itself or other prime gives non prime nos. so
11*11=121
11*13=143
11*17=187
11*19=209
11*23=253
11*29=319 which is not in range of 1-301 so we cant conider it
13*13=169
13*17=221
13*19=247
13*23=299
17*17=289
17*19=323 which is not in range of 1-301 so we cant conider it
So total possible nos are 10

Is this solution Helpfull? Yes (1) | No   

NRJ Soni  (8 years ago)

A no n is not a Prime no and lies 1

Is this solution Helpfull? Yes | No (1)  

Divi   (8 years ago)

1, 13*13,17*17,19*13,13*17

5 such nos

Is this solution Helpfull? Yes | No (2)  

juhi  (8 years ago)

1*1,11*11,13*13*11,13*17,13*19,13*23,17*17,19*19
So total of 8 solutions possible.

Is this solution Helpfull? Yes | No (1)  

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