As of recent years, there are approximately 80 categories in the Grammy Awards, recognizing various genres and aspects of music.

There are 100 centimeters in a meter.

There are 4 composite numbers between 1 and 10: 4, 6, 8, 9, 10.

1 hour corresponds to 15° of longitude since the Earth rotates 360° in 24 hours.

A time difference of 1 hour corresponds to 15° of longitude, so 2 hours = 2 * 15° = 30°.

A time difference of 4 hours corresponds to 4 * 15 = 60 degrees of longitude.

The first digit can be any of 10 digits, the second can be any of 9, the third can be any of 8, and the fourth can be any of 7. Total = 10 * 9 * 8 * 7 = 5040.

Each digit can be any of the 10 digits (0-9), so the total number of PINs is 10^4 = 10000.

The number of 4-digit PINs is P(10, 4) = 5040.

The number of ways to choose 2 from 5 is C(5, 2) = 10.

The number of ways to arrange 5 people is 5! = 120.

The number of arrangements of 5 people (3 men + 2 women) is 5! = 120.

The total arrangements = 6! / (3! * 2! * 1!) = 60.

The number of arrangements of 4 different colored balls is 4! = 24.

The number of arrangements of n people at a round table is (n-1)!. For 4 people, it is 3! = 6.

The number of ways to distribute 4 prizes among 10 students is 10P4 = 10! / (10-4)! = 5040.

The number of ways to choose 4 students from 10 is 10C4 = 210.

The number of ways to choose 4 from 10 is given by 10C4 = 210.

The number of arrangements of 6 people at a round table is (6-1)! = 5! = 120.

The number of arrangements of 6 people is 6! = 720.

The number of arrangements of the letters in 'BOOK' is 4! / 2! = 12.

The number of arrangements of the letters in 'MATH' is 4! = 24.

The word 'SCHOOL' has 6 letters with 'O' repeated twice. The arrangements are 6! / 2! = 720 / 2 = 360.

The power set of the empty set contains only one subset, which is the empty set itself. Thus, it has 1 element.

There are 9 essential amino acids that must be obtained from the diet.

There are 9 essential amino acids that must be obtained from the diet as the body cannot synthesize them.

There are 9 essential amino acids that the human body cannot synthesize and must be obtained from the diet.

The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, 36, totaling 9 factors.

There are 11 Fundamental Duties listed in Article 51A of the Indian Constitution.

The Indian Constitution originally provided for 7 fundamental rights, but currently there are 6 after the Right to Property was removed from the list.