Dear GMAT experts,

I have a few questions regarding indefinite pronouns and quantity words.

1. Some SC guides state that to determine where SANAM pronouns are singular or plural, you can look at the Of phrase which usually follows the pronoun. However, what if no "of" phrase follows the pronoun?

Eg. Some are good to eat. (Does "some" become plural if there is no "of" phrase aft Likewise for the other SANAM pronouns...)

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2. Is the word, "group" a collective singular noun? I get the impression that it can be categorized as an idiomatic expression that designates quantity, but if that is the case, then the verb would be determined by the "of phrase." Is that correct?

Eg1. A group of soldiers [verb]... (is this plural or singular?)

Eg2. A group is going...

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3. Some SC guides state that subjects preceded by "each" are singular. However, what if you have a compound subject where one subject is preceded by "each" and the other is not:

Eg. Each dog and all of the cats [verb]... (is this subject singular or plural?)

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4. Some SC guides state that to find the subject, you flip certain sentences. For example, "there are 3 dogs." -> 3 dogs are there.

However, what if the sentence is more complex:

Eg. There are 3 apples or 1 pear.

Do you flip it like this:
3 apples or 1 pear is there.
or like this:
1 pear or 3 apples are there.

Do the two different ways result in different verbs because the verb tense depend on the last noun after the "or"? In other words, should the original sentence have a singular or plural verb?