Question

What percentage of odd numbers are present in first 5 prime numbers?

• A. 20%
• B. 80%
• C. 100%
• D. 60%

Answer 1

The correct option is B 80%

First 5 prime numbers are 2, 3, 5, 7, 11
Odd numbers are 3, 5, 7, 11
$\text{There are 4 odd numbers out of 5 prime numbers}$
$\text{A fraction of odd numbers out of first five prime numbers}=\frac{4}{5}$

Let's convert $\frac{4}{5}$ into a percentage.
$\to \frac{4}{5}=0.80$
Multiply a decimal by 100 to convert it into a percentage = 0.80 × 100
= 80%

Thus, 80% of first five prime numbers are odd numbers.