Two two digit numbers are both composite numbers and coprime numbers. Their least common multiple is 210. Which two are these two numbers? Please advise

Two two digit numbers are both composite numbers and coprime numbers. Their least common multiple is 210. Which two are these two numbers? Please advise

210=2×3×5×7,
These two numbers are 10, 21, or 14, 15
10,21
10 and 21
The divisors of 210 are 1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70105210,
The answer is 10, 21
15，14
6，35
The sum of the smallest composite number, the smallest prime number and the smallest two digits is ()
The sum of the smallest composite number, the smallest prime number and the smallest two digits is (16)
4+2+10=16
Minimum sum: 4
Minimum Prime: 2
Minimum two digits: 10
And: 4 + 2 + 10 = 16
4+1+10=15
4+2+10=16
Two composite numbers are coprime numbers, and their least common multiple is 420. How many pairs of these two numbers are there
Three
So or such for uncountable nouns
How to modify plural nouns
So + adjective / adverb + (A / an) + (singular) plural countable noun
Such + plural countable noun / uncountable noun
So is an adverb, which can only modify adjectives or adverbs
Use "such" to modify uncountable nouns and plural nouns. If "fee", "little", "much" and "many" are used before a word, then "so" must be used
There is a sentence pattern of "there be" followed by two uncountable nouns with "and" and "are" or "is"
use is.There There is mean and rice on the table
Why
The indefinite pronouns A and an are used before the adjective noun. Are they according to the adjective or the noun?
For example: fill in an, a
（ ）good bus
（ ）good uniform
（ ）useful tool
（ ）useful example
I mean
A noun with an adjective
When the definite article is added before it
Does the definite article look at the letter in front of the adjective?
Is it the letter before the noun?
The article is close to the letter, such as a useful example and an example
But to be exact, it's not the letter but the pronunciation of the letter (phonetic alphabet). If the phonetic alphabet is a vowel, use an. If the letter is a vowel and its phonetic alphabet is not a vowel, use A. for example, the pronunciation of a university and u is "you", so use a
Comparative + than + any other + noun (singular or plural?)
A long time ago, I saw the introduction of this sentence pattern in the English teaching aids. The book says that the nouns in the sentences are singular, and then it also gives an example: she is young than any other student, so printing errors can be ruled out, Today I read this sentence in the Financial Times: more people have adapted the Internet and mobile telephone more quickly than any other technologies in history
The noun after "more than any" can come in the singular or plural form.The statement that the structure should only take a singular noun is totally groundless.She is younger than any other students in...
Excuse me, when I say I'm from which country, do you add a noun after a / an or an adjective?
When I come from which country do I add a noun or an adjective?
When asked about nationality, the most common answer is I am Chinese. Here, Chinese is an adjective, so there is no need to add a / an
Other plus countable noun singular or plural
Add the plural of countable nouns, such as
other students
The other is followed by the singular
another student
I know that "such" and "so" modify nouns and adjectives, but how to judge when they are nouns or adjectives
It's good books. How to analyze whether it's an adjective or a noun,
In short: such is followed by a noun, so is followed by an adjective
Use your example: such a good book or so good a book
Such is followed by a good book, which is equivalent to a noun phrase. A and good are just modifiers before the noun book
So is followed by good, which is an adjective