Which of the following expressions represents odd numbers ?

2n + 1

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4n + 4

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2n + 2

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6n + 2

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Solution

The correct option is A
2n + 1

For a number to be odd, when it is divided by 2, should leave a remainder of 1.

So, 2n + 1 when divided by 2 leaves a remainder of 1 while all others leave zero.

Therefore, 2n + 1 represents odd numbers.

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Similar questions

Δ_{r} = ∣ ∣ ∣ ∣ ∣ \begin{matrix} (r - 1) & n! & 6 (r - 1)^{2} & (n!)^{2} & 4 n - 2 (r - 1)^{3} & (n!)^{3} & 3 n^{2} - 2 n \end{matrix} ∣ ∣ ∣ ∣ ∣

n + 1 \prod r = 2 Δ_{r} =

If x represents a whole number, then which of the following expressions can represent any positive odd integer?

n

2 n, 3 n, 3 n + 1, 3 n - 5, 4 n + 1

\frac{2^{n} + 2^{n - 1}}{2^{n + 1} - 2^{n}}

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