ICSE Board Practice

Class VI Class VII Class VIII Class IX Class X
ICSE Grade VII - Factors and Multiples
Question 1
1.
Find the co-primes in the following
  • {12,28}
  • {10,42}
  • {15,63}
  • {15,35}
  • {5,21}
Question 2
2.
    • Find the prime factorization of
    • 18
  • 1
    		✕
    3 2
     
  • 2 2
     
    		✕
    3 2
     
  • 5
    		✕
    3 2
     
  • 2
    		✕
    3 2
     
  • 2
    		✕
    3 -1
     
Question 3
3.
    • Find the LCM of
    • {12,54,78,30}
  • 7021
  • 7020
  • 7019
  • 7022
  • 7018
Question 4
4.
    • Find the LCM of
    • {16,6}
  • 50
  • 49
  • 48
  • 47
  • 46
Question 5
5.
Find the twin primes in the following
  • (2,7)
  • (2,5)
  • (29,31)
  • (3,7)
  • (2,11)
Question 6
6.
Find all common factors of 10 , 20 and 36
  • {1,2,0}
  • {1,0}
  • {1,20}
  • {1,2,20}
  • {1,2}
Question 7
7.
    • Find the product of LCM and HCF of
    • {26,28,25,20}
  • 9100
  • 9099
  • 9102
  • 9101
  • 9098
Question 8
8.
The multiples of 16 =
  • {16,32,48,64,80,96,47,95}
  • {32,48,64,80,96,15}
  • {16,32,48,64,80,96,15}
  • {16,32,48,64,80,96}
  • {16,64,80,96,95,47}
Question 9
9.
    • Find the number of prime factors of
    • 4410
  • 5
  • 6
  • 1
  • 4
  • 3
Question 10
10.
The factors of 86 =
  • {1,2,43,86}
  • {1,43,2,3}
  • {1,2,43,3}
  • {1,2,43,86,3,42}
  • {1,2,43,86,42}