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# Is ab a multiple of 2 or 5 how do you know?

Updated: 9/23/2023

Wiki User

11y ago

The answer depends on whether ab represents a 2-digit number or, as in algebra, represents the product of a and b.

If ab represents a 2 digit number, so that, in fact, it is equivalent to 10*a+b, then it is divisible by 2 if b = 0, 2, 4, 6 or 8 and divisible by 5 if b is 0 or 5. The value of a makes no difference.

If ab represents the product of a and b and they are both integers, then ab is a multiple of 2 or 5 if at least one of a or b is a multiple or 2 or 5.

It gets a lot more complicated in the latter case if they can be non-integers.

The answer depends on whether ab represents a 2-digit number or, as in algebra, represents the product of a and b.

If ab represents a 2 digit number, so that, in fact, it is equivalent to 10*a+b, then it is divisible by 2 if b = 0, 2, 4, 6 or 8 and divisible by 5 if b is 0 or 5. The value of a makes no difference.

If ab represents the product of a and b and they are both integers, then ab is a multiple of 2 or 5 if at least one of a or b is a multiple or 2 or 5.

It gets a lot more complicated in the latter case if they can be non-integers.

The answer depends on whether ab represents a 2-digit number or, as in algebra, represents the product of a and b.

If ab represents a 2 digit number, so that, in fact, it is equivalent to 10*a+b, then it is divisible by 2 if b = 0, 2, 4, 6 or 8 and divisible by 5 if b is 0 or 5. The value of a makes no difference.

If ab represents the product of a and b and they are both integers, then ab is a multiple of 2 or 5 if at least one of a or b is a multiple or 2 or 5.

It gets a lot more complicated in the latter case if they can be non-integers.

The answer depends on whether ab represents a 2-digit number or, as in algebra, represents the product of a and b.

If ab represents a 2 digit number, so that, in fact, it is equivalent to 10*a+b, then it is divisible by 2 if b = 0, 2, 4, 6 or 8 and divisible by 5 if b is 0 or 5. The value of a makes no difference.

If ab represents the product of a and b and they are both integers, then ab is a multiple of 2 or 5 if at least one of a or b is a multiple or 2 or 5.

It gets a lot more complicated in the latter case if they can be non-integers.

Wiki User

11y ago

Wiki User

11y ago

The answer depends on whether ab represents a 2-digit number or, as in algebra, represents the product of a and b.

If ab represents a 2 digit number, so that, in fact, it is equivalent to 10*a+b, then it is divisible by 2 if b = 0, 2, 4, 6 or 8 and divisible by 5 if b is 0 or 5. The value of a makes no difference.

If ab represents the product of a and b and they are both integers, then ab is a multiple of 2 or 5 if at least one of a or b is a multiple or 2 or 5.

It gets a lot more complicated in the latter case if they can be non-integers.