Question Text
Question 2 :
By Goldbach's conjecture, every even number greater than 4 can be expressed as a sum of
Question 3 :
The number which have more than two factors are called _____.
Question 5 :
The product of $2 \times 7 \times 3 \times 5$ is a .........
Question 9 :
If 2009 = $\displaystyle p^{a}.q^{b}$ where p and q are prime numbers then find the value of p + q
Question 12 :
The total number of prime numbers between $120$ and $140$ are
Question 13 :
What is the sum of the smallest prime and the largest prime less than $10$?
Question 15 :
The two numbers which have only $1$ as their common factor are called _______.
Question 17 :
The numbers which have more than two factors are called _______.
Question 21 :
The numbers which have only two factors (1 and the number itself) are called as ________.
Question 22 :
Choose the composite numbers from the following numbers $87, 67, 45, 34, 23, 27, 33$.
Question 23 :
If m and n are prime numbers greater than $2$, which of the following could also be a prime number?