Question

10.
ours
er of y. Also
B. Marke (/) against the correct answer in each of the following:
11. Which of the following are co-primes?
(a) 91 and 72 (b) 34 and 51
(c) 21 and 36
(d) 15 and 20
12. The LCM of two co-prime numbers is their
(a) sum
(b) difference (c) product
(d) quotient
13. The number which is neither prime nor composite is
(a)
(b) 1
(c) 2
(d) 3
14. What least number should be replaced for * so that the number 67301*2 is exactly
divisible by 9?
(a) 5
(b) 6
(c) 7
(d) 8
15. Which of the following numbers is divisible by 6?
(a) 67821
(b) 78134
(c) 87432
(d) none of these
16. Which of the following is a prime number?
(a) 143
(b) 131
(c) 147
(d) 161
17
(d)
21
-y 8;
289
when reduced to lowest term is
391
13
17
17
(b)
(c)
17
19
23
18. Every counting number has an infinite number of
(a) factors (b) multiples
(c) prime factors
e digits
(d) none of these​

Answer 1

Answer:

11.15 and 20

12. product

13.1

14.8

15.87432

16.131

18.factors