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| Date post: | 02-Jan-2016 |
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These numbers are all divisible by 2. Can you see why?• 4
• 18
• 912
• 636
• 9,720
Here’s a hint --
The ones digit is even!
• A number is divisible by 2 if the ones digit is even.
Are these numbers divisible by 2?55
8282
917917
5,2765,276
8,478,1848,478,184
NO
YES
NO
YES
YES
These numbers are all divisible by 3. Can you see why?• 9
• 63
• 714
• 225
• 9,720
Here’s a hint –
**Add up the digits of each number**
The sum of the digits is divisible by 3!
• A number is divisible by 3 if the sum of the digits is divisible by 3.
Are these numbers divisible by 3?77
2727
824824
271,360271,360
9,265,6899,265,689
NO
YES
NO
NO
YES
These numbers are all divisible by 4. Can you see why?• 16
• 912
• 720
• 8,224
• 917,532
Here’s a hint --
If the last two digits form a number divisible by 4!
• A number is divisible by 4 if the last two digits form a number divisible by 4.Are these numbers divisible by 4?1515
240240
1,6931,693
4,4084,408
12,982,54012,982,540
NO
YES
NO
YES
YES
These numbers are all divisible by 5. Can you see why?• 15
• 280
• 2,475
• 82,470
• 153,645
Here’s a hint --
The ones digit is a 0 or 5!
• A number is divisible by 5 if the ones digit is a 0 or 5.
Are these numbers divisible by 5?1515
240240
1,6931,693
4,4084,408
12,982,54012,982,540
YES
YES
NO
NO
YES
These numbers are all divisible by 6. Can you see why?• 48
• 90
• 174
• 1,044
• 39,720
Here’s a hint –
**Think about our other rules and what two numbers are factors of 6.**
The number is divisible by both 2 and 3!
• A number is divisible by 6 if the number is divisible by both 2 and 3.Are these numbers divisible by 6?135135
462462
7,0267,026
50,31950,319
12,982,44012,982,440
NO
YES
YES
NO
YES
These numbers are all divisible by 9. Can you see why?• 18
• 612
• 7,443
• 81,225
• 99,720
Here’s a hint –
**Add up the digits of each number**
The sum of the digits is divisible by 9!
• A number is divisible by 9 if the sum of the digits is divisible by 9.
Are these numbers divisible by 9?7272
183183
1,2871,287
189,101189,101
12,982,44012,982,440
YES
NO
YES
NO
NO
These numbers are all divisible by 10. Can you see why?• 50
• 240
• 8,770
• 42,420
• 153,640
Here’s a hint --
The ones digit is 0!
• A number is divisible by A number is divisible by 1010 if if the the ones digit is 0.ones digit is 0.
Are these numbers divisible by 10?7070
183183
1,2801,280
189,101189,101
142,982,530142,982,530
YES
NO
YES
NO
YES
Determine whether each number is divisible by 2, 3, 4, 5, 6, 9, or 10.
712 2, 4
1,035
32,221
8,340
3, 5, 9
none
2, 3, 4, 5, 6, 10
Assignment
•Divisibility Rules WS
You can do it!
