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Divisibility Rules

Exponent RulesAnswers
OLD I. OLFACTORY
OPIE II. OPTIC
OCCASIONALLY III. OCULOMOTOR
TRIES IV. TROCLEAR
TRIGNOMETRY V. TRIGEMINAL
AND VI. ABDUCENS
FEELS VII. FACIAL
VERY VIII. VESTIBULOCOCHLEAR
GLOOMY IX. GLOSSOPHARYNGEAL
VAGUE X. VAGUS
AND XI. ACCESSORY
HYPOACTIVE XII. HYPOGLOSSAL
Is 540 Divisible by 2 Yes ends in a zero
Is 748 Divisible by 4 Yes last 2 digits divisible by 4
Is 545 divisible y 10 NO, does not end in a zero
Is 918 Divisible by 9 Yes 9+1+8 = 18 and 18 is divisible by 9
Is 54 Divisible by 3 Yes 5+ 4 = 9 and 9 is divisible by 3
Is 700848 Divisible by 8 Yes 8 goes into the last 3 digits 106 times
Is 108 Divisible by 3 and 9 Yes 1+ 8 = 9 and is divisible by both 3 and 9
Is 2,356 divisible by 2? Yes. 2,356 ends with a 6.
Is 90 divisible by 10? Yes. 90 ends with a 0.
Is 560 divisible by 5? Yes. 560 ends with 0.
Is 745 divisible by 2? No. Check the last digit. It should be even to be divisible by 2.
Is 634 divisible by 5? No. The last digit should be 0 or 5 in order for a number to be divisible by 5.
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.
Is 402 divisible by 10? No. In order for a number to be divisible by 10, the number has to end in 0.
Is 1,000 divisible by 3? No. The sum of all the digits, 1 + 0 + 0 + 0 = 1. One is not divisible by 3.
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.
Is 612 divisible by 9? Yes. Add 6 + 1 + 2. The answer is 9. 9 is divisible by 9.
Is 144 divisible by 3? Yes. 1 + 4 + 4 = 9. 9 is divisible by 3.
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.
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.
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.
Created by: htea