Generally speaking, when writing out numbers in words between 21 and 99 in English, hyphens are used between the tens digit and units digit.
This contrasts with a language such as Italian, where numbers between 21 and 99 are written as single words, without hyphens, for example, the word for the number 32 is trentadue.
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It is 16. This is because there are five numbers between 11 and 16, and there are five numbers between 16 and 21 :]
24 + 21 = 45 24 - 21 = 3 Therefore, the two numbers are 21 and 24.
Ah, isn't that a happy number to work with? To write 21 million in numbers, you simply write 21 followed by six zeros: 21,000,000. Just think of all the happy little zeros dancing around that 21, creating a beautiful number on your canvas of mathematics.
Between 11 and 21: 12, 14, 15, 16, 18 and 20.
Between 52 and 73 there are 53, 54, ..., 72 a total of 72 - 53 + 1 = 20 numbers. Including 52 and 73 there are 22 numbers.