Question

Choose the suitable pair of co-prime factors given below in the box and test the divisibility of the following numbers:-
( 9 and 5 , 3 and 5 , 4 and 9 , 5 and 8 )
(a) 56340 by 36
(b) 9990 by 45
(c) 3245 by 15
(d) 74980 by 40
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Answer 1

Answer:

Step-by-step explanation:

a- 56340 by 4 = 14085

56340 / 9 = 6260.

as it is divisible by 4 and 9, it is divisible by 36

b- 9990 / 9 = 1110

9990 ends with 0 so it is multiple of 5

as it is divisible by both 5 and 9 it is multiple of 5*9= 45

c- 3245/ 3 = 1081.67

thus it isnt multiple of 3 and thus not divisible by 15