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Answer:
1)
If a number is divisible by 2 and the last two digits are divisible by 4 then the number is divisible by both 4 and 8.
(a) In 572,
572/2 = 286
and 72/4 = 18
So, the number is divisible by 8.
(b) In 14560,
14560/2 = 7280
and 60/4 = 15
2)
If a number is divisible by both 3 and 2, then the number is divisible by 6.
And divisibility by 3 is that if the sum of the digits of the number is divisible by 3 then the number is divisible by 3.
(a) In 17852,
17852/2 = 8926
1+7+8+5+2 = 23
But, 23 is not divisible by 3.
So, 17852 is not divisible by 6.
(b) In 4335,
4335/2 = 2167.5
Since, 4335 is completely not divisible by 2, so 4335 is not divisible by 6.
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