no, 1 is an odd number. Even numbers are multiples of 2 such as 2,4,6,8 etc.
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YES. Any number multiplied by an even number is an even number.
one is the lowest number
The sum of an odd and even number is always odd because there's always one left over. Think of any odd number as being any even number plus one. If you add two even numbers, the answer is always even. If you add an even and an odd (plus one), the answer is always odd.
The sum of an odd and even number is always odd because there's always one left over. Think of any odd number as being any even number plus one. If you add two even numbers, the answer is always even. If you add an even and an odd (plus one), the answer is always odd.
Look at the last digit: * if it is one of {0, 2, 4, 6, 8} it is an even number; * if it is one of {1, 3, 5, 7, 9} it is an odd number. The last digit of 661290 is 0, so it is an even number.