This is a valid answer.
The school had to see if each students ID cards were valid before entering the school dance
"What if the credit card number isn't valid?"
Of course. The shortest valid such sentence would be: "It is."
I am not writing a sentence using that word.
a sentence using the word endotracheal
This is a sentence using the word aviator.
I am saying a sentence using the word collagen.
this is a sentence using the word armchair.
Please type a sentence using the word assertion.
I can write a sentence using the word scorn!
That is a sentence using the word troops.
A valid number sentence that is true: 3 + 7 = 10. A valid number sentence that is false: 7 + 9 = 17. A valid number sentence using a 'less than' symbol: 3 + 6 < 10.