Divisibility Rules
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| OLD | I. OLFACTORY
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| OPIE | II. OPTIC
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| OCCASIONALLY | III. OCULOMOTOR
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| TRIES | IV. TROCLEAR
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| TRIGNOMETRY | V. TRIGEMINAL
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| AND | VI. ABDUCENS
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| FEELS | VII. FACIAL
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| VERY | VIII. VESTIBULOCOCHLEAR
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| GLOOMY | IX. GLOSSOPHARYNGEAL
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| VAGUE | X. VAGUS
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| AND | XI. ACCESSORY
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| HYPOACTIVE | XII. HYPOGLOSSAL
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| Is 540 Divisible by 2 | Yes ends in a zero
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| Is 748 Divisible by 4 | Yes last 2 digits divisible by 4
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| Is 545 divisible y 10 | NO, does not end in a zero
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| Is 918 Divisible by 9 | Yes 9+1+8 = 18 and 18 is divisible by 9
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| Is 54 Divisible by 3 | Yes 5+ 4 = 9 and 9 is divisible by 3
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| Is 700848 Divisible by 8 | Yes 8 goes into the last 3 digits 106 times
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| Is 108 Divisible by 3 and 9 | Yes 1+ 8 = 9 and is divisible by both 3 and 9
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| Is 2,356 divisible by 2? | Yes. 2,356 ends with a 6.
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| Is 90 divisible by 10? | Yes. 90 ends with a 0.
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| Is 560 divisible by 5? | Yes. 560 ends with 0.
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| Is 745 divisible by 2? | No. Check the last digit. It should be even to be divisible by 2.
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| Is 634 divisible by 5? | No. The last digit should be 0 or 5 in order for a number to be divisible by 5.
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| 435 is divisible by 2 numbers. What are they? | 3 and 5. Why? If you add 4 + 3 + 5 = 12. 12 is divisible by 3. Therefore, 435 is divisible by 3.
Check the last digit. It's 5. That means 435 is divisible by 5.
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| Is 402 divisible by 10? | No. In order for a number to be divisible by 10, the number has to end in 0.
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| Is 1,000 divisible by 3? | No. The sum of all the digits, 1 + 0 + 0 + 0 = 1. One is not divisible by 3.
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| Is 634 divisible by 6? | No. It is divisible by 2 because it ends in an even number. However, 634 is not divisible by 3, because 6 + 3 + 4 = 13 and 13 is not divisible by 3. Therefore, 634 cannot be divisible by 6.
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| Is 612 divisible by 9? | Yes. Add 6 + 1 + 2. The answer is 9. 9 is divisible by 9.
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| Is 144 divisible by 3? | Yes. 1 + 4 + 4 = 9. 9 is divisible by 3.
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| Divisibility Rule for 7 | Take the last digit of the number; double it; then subtract it from the rest of the number. If the result is divisible by this number, then so is the original number.
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| Check to see if 217 is divisible by 7. | Yes. 7*2=14; 21-14 = 7. Since 7 is divisible by 7, then so is 217.
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| Check to see if 896 is divisible by 7. | 6*2 = 12; 89 - 12 = 77; Since 77 is divisible by 7, then so is 896.
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Created by:
htea
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