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Which is the odd number 16 36 64 27 81?
27 and 81 are the odd numbers. Since odd numbers are 1, 3, 5, 7 and 9, look at the last number and you will be able to tell if it's odd or even.
Is 81 odd or even?
Odd
What is the sum of the first 81 odd numbers?
To find the sum of the first 81 odd numbers, we can use the formula for the sum of an arithmetic series: Sn = n/2 * (2a + (n-1)d), where n is the number of terms, a is the first term, and d is the common difference. In this case, n = 81, a = 1 (first odd number), and d = 2 (since the difference between consecutive odd numbers is 2). Plugging these values into the formula, we get: S81 = 81/2 * (2(1) + (81-1)2) = 81/2 * (2 + 160) = 81/2 * 162 = 6561. Therefore, the sum of the first 81 odd numbers is 6561.
What is the odd number out 16 36 64 27 81?
The only number in that list which is not a square number is 27. 27 is a cube number.
Number is the odd one out 16 49 81 100 144 729 1296 3764?
3764. The rest are perfect squares.
