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kittu

· started a discussion

· 1 Months ago

wrong (Question: 630838.0 )

why not count 13,43 it is also prime no

Question:

Find the number of composite numbers between 5 to 50, including both.

Options:
A)

35

B)

33

C)

34

D)

32

Solution:

Ans: (b)

Composite numbers between 1 and 50

Composite numbers are those which have 3 or more factors:

There are 15 prime numbers less than 50 , which are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47 Therefore there are 48 − 15 = 33 composite numbers between 1 and 50 .

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