1. Home
  2. / Forum

User Forum

Ask Your Question
Shruti Hegde from Mount Litera Zee school, Bengaluru
Subject :IMO    Class : Class 8

Find the number of prime factors of


A4
B7
C3
D5


the right answer for this should be 7, and not 3... could anyone explain why the answer for this is 3?

Ans 1:

Pranav from Ganges valley school, Hyderabad
Class : Class 8
The answer is 3. When you solve the equation you get 3*3*1*1*2*14/1*1*1. Now we see that the prime numbers left are 3,3 and 2. Therefore there are 3 prime numbers.

Ans 2:

Akshara from NPS, Bengaluru
Class : Class 8
Yes .... The answer is 4. ( 2, 3 ,5 and 7)

Ans 3:

Pranav from Ganges valley school, Hyderabad
Class : Class 8
The answer is 3. When you solve the equation you get 3*3*1*1*2*14/1*1*1. Now we see that the prime numbers left are 3,3 and 2. Therefore there are 3 prime numbers.

Ans 4:

svayumbhu sharma from jodhamal public school, jammu
Class : Class 9

Ans 5:

Mohammed Aatif Afnan from Phoenix Greens School of Learning, Hyderabad
Class : Class 8
The answer is 4, not 3

Ans 6:

Yuvraj Singh Dhaliwal from The British School, Patiala
Class : Class 8

Ans 7:

Shreya Shruti from Airforce school , Bengaluru
Class : Class 8
the answer is 4!!!

Ans 8:

Mudit garg from La blossoms school, Jalandhar
Class : Class 7

Ans 9:

ARNAV BARANWAL from KPS SCHOOL, bhilai
Class : Class 4
ans is 7

Ans 10:

DEVRAJ DOLEY from NPS INTERNATIONAL SCHOOL, Guwahati
Class : Class 8
the answer is 7.

Ans 11:

Hari Bhaskar from bgs, JP Nagar 7th Phase
Class : Class 6
the solution of the equation is 3*3*5*5*5*2*7 which has seven prime factors

Ans 12:

jayashree easwaran from vibgyor High, Bengaluru
Class : Class 4
isn't the answer "A"

Ans 13:

Ayush Gorain from Sarala Birla Public School, Ranchi
Class : Class 8
The answer should be option (A) = 4. There are 4 prime factors, i.e. 2, 3, 5 and 7. The solution contradicts the question's answer.

Ans 14:

Ashwin Shridhar from Vidyashilp Academy, Bangalore
Class : Class 9
4

Ans 15:

Aman Sumod from Chinmaya Vidyalaya, KANNUR
Class : Class 8
The answer is 4. There are 4 prime factors: 2,3,5 and 7

Ans 16:

Ishaan Pal from Christ Academy, Bangalore
Class : Class 9
ans is 4. (2,3,5,7)

Ans 17:

Angshu from Dehli Public School Bangalore East, Bangalore
Class : Class 9
The answer should be (A) 4.There are four factors, i.e. 2,3,5,7. Even the solution says so. Please correct the error.

Post Your Answer