Question

Question 12
The HCF of two consecutive odd numbers is
a. 3
b. 2
c. 1
d. 0
Question 13
The HCF of two consecutive even numbers is
a. 0
b. 1
c. 2
d. 3
Question 14
The HCF of 66,77,88
a. 11
b. 12
c. 13
d. 17
Question 15
The LCM of two consecutive numbers is
a. their sum
b. their product
c. their difference
d. none of these
Question 16
The smallest odd composite number is
a. 5
b. 15
c. 9
d. 3
Question 17
Find the smallest 4-digit number which is divisible by 6, 8, 9
a. 2012
b. 2160
c. 2088
d. 2016
Question 18
The LCM of two co-prime numbers is
a. their sum
b. their product
c. their difference
d. none of these
Question 19
Which of the following is false?
a. The number 2 and 3 are co-prime
b. The numbers 41 and 43 are twin primes
c. The number 5,28   are co-prime
d. none of these​

Answer 1

Answer:

12)  c. 1

13)  c. 2

14)  a. 11

15)  b. their product

16)  c. 9

17) d. 2016

18)  b. their product

19)  c. The number 5,28   are co-prime

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