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16 Cards in this Set
- Front
- Back
- 3rd side (hint)
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11^2 |
121 |
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12^2 |
144 |
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13^2 |
169 |
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14^2 |
196 |
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15^2 |
225 |
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16^2 |
256 |
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17^2 |
289 |
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18^2 |
324 |
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19^2 |
361 |
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20^2 |
400 |
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If the digits add up to a multiple of 3 |
It is a multiple of/is divisible by 3 |
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The last two digits form a mutliple of 4 |
A mutliple of/is divisble by 4 |
Ex. 103424. 24 ÷ 4 =6 |
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If the last 3 digits form a multiple of 8 |
It's a multiple of 8 |
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It's digits add up to a multiple of 9 |
It's a multiple of 9 |
34164. 3+4+1+6+4 = 18, which is 9×2 |
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If it ends in 0... |
It's a multiple of 10 |
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(When multiplying two numbers) Mutliply the end digits and look at the last digit of the product |
This is helpful in multiple choice |
23×257, 3×7 = 21. |
