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1. Use tests for divisibility to show that; 2. a Show that 2739 is divisible by
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8 заданий
1. Use tests for divisibility to show that 5328 is divisible by 4 and by 9.
2. a Show that 2739 is divisible by 11. b When the digits are reversed, the number is 9372. Is 9372 divisible by 11? Give a
3. a Show that 67 108 is divisible by 4. b Is 67 108 divisible by 8? Give a reason for your answer.
4. The number 3812* is divisible by 3. The final digit is missing. What can you say about the missing digit?
5. What integers less than 12 are factors of 7777?
6. a Use the digits 5, 4, 2 and 1 to make a number that is divisible by: i 5 ii 3. b Can you arrange the digits 5, 4, 2 and
7. 322 is divisible by 7. Use this fact to find a number that is divisible by 7, 2 and 3.
8. Find the smallest positive integer that is not a factor of 2520. Give reasons for your answer.
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