Question

Please give explanation with answers


10. Pairs of natural numbers whose least
common multiple is 78 and the greatest common
divisor is 13 are:
(a) 58 and 13 or 16 and 29
(b) 68 and 23 or 36 and 49
(c) 18 and 73 or 56 and 93
(d) 78 and 13 or 26 and 39
11. Two natural numbers whose sum is 85 and
the least common multiple is 102 are:
(a) 30 and 55
(b) 17 and 68
(c) 35 and 55
(d) 51 and 34
12. 4 Bells toll together at 9.00 am. They toll after
7,8,11 and 12 seconds respectively. How many
times will they toll together again in the next 3
hours?
(a) 3
(b) 4
(c) 5
(d) 6
13. A forester wants to plant 66 apple trees, 88
banana trees and 110 mango trees in equal rows
(in terms of number of trees). Also he wants to
make distinct rows of trees (.e, only one type of
trees in one row). The number of minimum rows
required are
(a) 2
(b) 3
(c) 10
(d) 12​

Answer 1

Answer:

Step-by-step explanation:

10) d

11) d