Question

Practice worksheet 1 :

Q.1 What do you mean by the prime number & composite number? Explain with 3-4 examples each.


Q.2.Write whether prime or composite :
1) 57. 2) 27. 3) 37. 4) 17
5) 87. 6) 47. 7) 67. 8) 97
9) 33. 10) 63. 11) 43. 12) 51
13) 73 14) 93. 15) 59. 16) 71
17) 81. 18) 91. 19) 39. 20) 79

Q. 3.Write all the prime numbers between 1 & 50.

Q.4. Write all the composite numbers between 20 & 50.

Q.5. Write all the prime numbers between 1 & 100? How many are they?​

Answer 1

Answer:

Q.1

Prime number:

A prime number is a number which has exactly two factors i.e. '1' and number itself.

E.g: The first 5 prime numbers are 2, 3, 5, 7, and 11.

Composite number:

A composite number has more than two factors, which means apart from getting divided by number 1 and itself, it can also be divided by at least one integer or number.

E.g: 4, 6, 8, 9 and 10 are the first few composite numbers.

Q.2

PRIME NUMBERS:

37, 17, 47, 67, 97, 43, 73 59, 71, 79

COMPOSITE NUMBERS:

57, 27, 87, 33, 63, 51, 93, 81, 91, 39,

Q.3

All the prime numbers between 1 & 50

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47.

Q.4

All the composite numbers between 20 & 50

20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50.

Q.5

There are 25 prime numbers between 1 & 100. They are:

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71,

73, 79, 83, 89, 97

___________________________________

Hope it helps you. Mark me as the BRAINLIEST