2 is the smallest even prime number and 3 is the smallest odd prime number.

The prime numbers up to 100 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

The first 100 composite numbers are

4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33,

34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58,

60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85,

86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99, 100, 102, 104, 105, 106, 108,

110, 111, 112, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125,

126, 128, 129.

35 = 7 x 5 x 1

39 = 3 x 13 x 1

Both 35 and 39 are composite numbers,the only factor common between them is 1.

∴ 35 and 39 are co-prime numbers.

The twin primes between 1 to 100 are

3-5, 5-7, 11-13, 17-19, 29-31, 41-43, 59-61, 71-73

• Prime-Composite numbers

• Divisibility rules

• Prime Factorization

• H.C.F or G.C.F

• L.C.M

• Application on LCM

Number System

Home Page

GMAT

GRE

1st Grade

2nd Grade

3rd Grade

4th Grade

5th Grade

6th Grade

7th grade math

8th grade math

9th grade math

10th grade math

11th grade math

12th grade math

Precalculus

Worksheets

Chapter wise Test

MCQ's

Math Dictionary

Graph Dictionary

Multiplicative tables

Math Teasers

NTSE

Chinese Numbers

CBSE Sample Papers