ungerade
odd
Describes a whole number that is not divisible by two without a remainder.
Die Hausnummern auf dieser Straßenseite sind alle ungerade.
The house numbers on this side of the street are all odd.

odd / crooked
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odd
Describes a whole number that is not divisible by two without a remainder.
Die Hausnummern auf dieser Straßenseite sind alle ungerade.
The house numbers on this side of the street are all odd.

The word consists of the prefix 'un-' and 'gerade' (straight/even). 'Gerade' can mean both 'straight' (not bent) and 'even' (divisible by two). The prefix 'un-' negates these qualities.
Die Linie ist nicht perfekt, sie ist etwas ungerade.
The line is not perfect; it is a little crooked.
The context makes the meaning clear. If you are talking about numbers, digits, or mathematics, 'ungerade' means 'odd.' If you are talking about physical objects, lines, or positions, it means 'schief' (slanted/crooked) or 'krumm' (bent/crooked).
Die Zahlen 3, 5 und 7 sind ungerade.
The numbers 3, 5, and 7 are odd.
In the mathematical meaning, the most common and important combination is 'eine ungerade Zahl' (an odd number).
Neun ist eine ungerade Zahl.
Nine is an odd number.
In the meaning 'schief' (crooked/slanted), 'ungerade' is often used with verbs of positioning, for example 'ungerade hängen' (to hang crooked), 'ungerade stehen' (to stand crooked), or 'ungerade sitzen' (to sit crooked / be positioned crookedly).
Deine Krawatte sitzt ungerade, du solltest sie richten.
Your tie is sitting crooked; you should straighten it.
right now / straight
'gerade' and 'ungerade' are clear opposites, especially with numbers. An even number can be divided by two; an odd number cannot. Both words can also have to do with shapes: 'gerade' then means straight, without a bend, while 'ungerade' means not quite straight or level. In everyday language, though, people often use 'schief' or 'krumm' for shapes. With numbers, 'gerade' and 'ungerade' are the normal distinction.

Hat dein Formular eine ungerade Nummer bekommen?
Did your form get an odd number?
Die Zahl 24 ist gerade und lässt sich durch zwei teilen.
The number 24 is even and can be divided by two.