188 Amount / Number/ sum

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1. Number is regularly used with count nouns

a large number of mistakes

any number of times

while amount is mainly used with mass nouns.

annual amount of rainfall
Sum is  an indefinite or specified amount of money 2. the whole amount : aggregate 3. the utmost degree :

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Examples of amount-

1. .Consuming high amounts of sugar and sugar-based foods leads to weight gain.

2. Add a small amount of sugar"

3. Small amounts of land were used for keeping animals.

4. we use a huge amount of paper in the office every day.

 [ amount refers to money and quantity both] 

Examples of sum-

The sum of all the angles of a triangle is 180 degrees.

This is a fabulous sum of money.

They spent large sums (of money) repairing the house.

• We donated a small sum (of money) to the charity.
• 
  
• Examples of number-

• 1. A higher number of audience booked a ticket for the concert.

  [A higher number of- shows degree of comparison, amount, or intensity.]

  2.  A number of problems have arisen.- means some problems.