Question

1The L.C.M of 3 and 7 is ________

a)12 b)21 c)1

2.Which is the smallest composite odd number?

a)9 b)1 c)3

3.The H.C.F of 9 and 14 is________

a) -1 b) 1 c) 0

4.Is the first number a factor of the second? 8,32

a) No b) Yes c)0

5.The sum of any number of even numbers is an even number.

a) False b) True c) Neither true or false.​

Answer 1

1 . 21

2. 9

3. 1

4. yes

5. True

Answer 2

Answer:

(1) The LCM of 3 and 7 is (b) 21

Step-by-step explanation:

LCM

multiples of both the numbers

3: 3,6,9,12,15,18,21,24,27,30

7:7,14,21,28,35,42,49,56,63,70

Mark the lowest common multiple (LCM) which is 21