Composite Numbers from 1 to 200

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What is a Composite Number

A natural number which is divisible by at least one other number other than itself and 1 is called a composite number.

Ex :- 4, 6, 8, 9, 10, 12, ………infinite.

Composite Numbers from 1 to 100

	22	42	62	82
4	24	44	64	84
6	26	46	66	86
8	28	48	68	88
10	30	50	70	90
12	32	52	72	92
14	34	54	74	94
16	36	56	76	96
18	38	58	78	98
20	40	60	80	100

How to Find Composite Numbers

All positive integers whose factors are two or more than two are called composite numbers.

That is, if understood in simple language – positive numbers having three or more than three factors are called composite numbers.

As :-

20 ÷ 1 = 20
20 ÷ 2 = 10
20 ÷ 4 = 5
20 ÷ 5 = 4
20 ÷ 20 = 1

The factors of 20 are 20, 10, 5, 4 and 1. These factors are more than three. That is, these are Composite Numbers.

Composite Numbers from 101 to 200

102	110	116	121	126	133	140	145	152	158	165	174	180	187	194
104	111	117	122	128	134	141	146	154	159	166	175	182	188	195
105	112	118	123	129	135	142	147	155	160	168	176	184	189	196
106	114	119	124	130	136	143	148	156	162	170	177	185	190	198
108	115	120	125	132	138	144	150	157	164	172	178	186	192

Problems Based on Composite Numbers

Question 1. How many composite numbers are there between 1 to 10?
A. 2
B. 4
C. 6
D. 8

The composite numbers from 1 to 10 are :- 4, 6, 8, 10.
Hence there are 4 composite numbers between 1 and 10.

Question 2. What is the smallest even composite number?
A. 2
B. 4
C. 6
D. 8

Answer:- The smallest even composite number is 4.

Question 3. What is the sum of first 10 composite numbers?
A.125
B.120
C.135
D.130

Solution:- According to the question,
First 10 composite numbers – 4, 6, 8, 10, 12, 14, 16, 18, 20, 22
Sum of first 10 composite numbers = 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 + 22
Answer:- 130

Question 4. What will be the average of 35 consecutive even numbers?
A. 30
B. 31
C. 32
D. 36

Solution:- According to the question,
n = 30
Average of n consecutive even numbers = 35 + 1
mean = 36
Answer:- 31

Question5. What will be the average of 50 consecutive even numbers?
A. 21
B. 31
C. 41
D. 51

Solution:- According to the question,
n = 50
Average of n consecutive even numbers = 50 + 1
average = 51
Answer:- 51

Question 6. What will be the difference between the first 7 composite numbers and the first 4 prime numbers?
A. 41
B. 54
C. 61
D. 71

Solution:- According to the question,
First 7 composite numbers – 4, 6, 8, 10, 12, 14, 16
First 3 prime numbers – 1, 3, 5, 7
Difference between composite numbers and prime numbers = (4 + 6 + 8 + 10 + 12 + 14 + 16) – (1 + 3 + 5 + 7)
= 70 – 16
Answer:- 54

Question 7. What will be the average of 2, 4, 6, 8, 10, 12, 14, 16, 18 and 20?
A. 11
B. 13
C. 15
D. 17

Solution: According to question,
n = 20
Average of consecutive even numbers up to n = (n+2)/2
Average = (20+2)/2
= 22/2
Answer:- 11

Question 8. What will be the difference between the first 10 composite numbers and the first 5 prime numbers?
A. 41
B. 51
C. 96
D. 105

Solution:- According to the question,
First 10 composite numbers – 4, 6, 8, 10, 12, 14, 16, 18, 20, 22
First 5 prime numbers – 1, 3, 5, 7, 9
The difference between composite numbers and prime numbers = (4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 + 22) – (1 + 3 + 5 + 7 + 9)
= 130 – 25
Answer:- 105

Read More
Even Numbers	Integer Number	Prime Numbers
Odd Numbers	Whole Number	Number System

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