No, reversing the order of the digits of a two-digit prime number does not always result in a Prime number.
No. For example, reversing 23 gets 32.
As a result of the rule that you use the definition of the term - such as significant digits - when finding them for a number.
Your question is incomplete. Adding an even number with an odd number will always result in an odd number. Multiplying an even number with an odd number will always result in an even number.
A rational number is always the result of dividing an integer when the divisor is nonzero.
an odd numberSubtracting an odd number from an even number will always result in an odd number.
No because as for example 23 is a prime number but 32 is a composite number
No. For example, reversing 23 gets 32.
any of the following numbers works ...12, 23, 34, 45, 56, 67, 78, 89,
the result is always even
No, and you do not even if you reverse them.
19
As a result of the rule that you use the definition of the term - such as significant digits - when finding them for a number.
38
It always is a negative number. The result will be the sum of the two digits with a minus sign in front of it, eg, (-4) - (+7) = -4 - 7 = -11.
This follows from the property that the set of integers is closed under addition. This means that any two integers, when added together, must always result in a whole number.
Alberto
When multiplying numbers with different numbers of significant digits, the result should have the same number of significant digits as the least precise measurement. Count the number of significant digits in each number, perform the multiplication as usual, and then round the result to the least number of significant digits used in the calculation.