2. A number is divisible by ........ if the last digit is even.
3. A number is divisible by ........ if its last digit is zero.
4. A number is divisible by ........ if the last digit is zero or five.
5. A number is divisible by ........ if the sum of the digits is divisible by 3.
6. 24... is divisible by 10.
7. 46... is divisible by 3.
8. 69810, is it divisible by 10?
9. 5783, is it divisible by 3?
10. 369, is it divisible by 6?
Answers
Answer:
Divisibility by: 2 If the last digit is even, the number is divisible by 2. 3 If the sum of the digits is divisible by 3, the number is also. If the last two digits form a number divisible by 4, the number is + also.
Examples:
14 is divisible by 7, because 14 ÷ 7 = 2 exactly
15 is not divisible by 7, because 15 ÷ 7 = 2 17 (the result is not a whole number)
0 is divisible by 7, because 0 ÷ 7 = 0 exactly (0 is a whole number)
"Divisible by" and "can be exactly divided by" mean the same thing
The Divisibility Rules
Divisibility rules for numbers 1–30
Divisor Divisibility condition
4 If the tens digit is even, the ones digit must be 0, 4, or 8. If the tens digit is odd, the ones digit must be 2 or 6.
Twice the tens digit, plus the ones digit is divisible by 4.
5 The last digit is 0 or 5.
6 It is divisible by 2 and by 3
Divisibility rules for numbers 1–30
Divisor Divisibility condition
2 The last digit is even (0, 2, 4, 6, or 8).
3 Sum the digits. The result must be divisible by 3.
Subtract the quantity of the digits 2, 5, and 8 in the number from the quantity of the digits 1, 4, and 7 in the number. The result must be divisible by 3.
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