The sum of the natural numbers which are divisors of 100, is:

If m and n are distinct natural numbers, then which of the following is/are integer(s)?

(A) $m/n + n/m$

(B) $mn(m/n+n/m)(m^2 + n^2)^{-1}$

(C) $mn/(m^2 + n^2)$

Choose the correct answer from the options given below:

The value of $\frac{(2 \cdot 7)^3 - (2 \cdot 2)^3}{(2 \cdot 7)^2 + 2 \cdot 7 \times 2 \cdot 2 + (2 \cdot 2)^2}$ is

Arrange the fractions in decreasing order:

(A) $\frac{4}{5}$

(B) $\frac{7}{8}$

(C) $\frac{3}{7}$

(D) $\frac{5}{9}$

Choose the correct answer from the options given below:

The sum of greatest five digits and lowest/smallest four digits number is:

Which one is correct

A. $\sqrt{3}$ is irrational

B. Sum of two irrational number is always irrational

C. $\sqrt{p}$, where $p$ is prime, is irrational

D. Every composite number can be expressed as a product of primes

Choose the correct answer from the options given below:

The sum of LCM and HCF of two numbers is 854. If the LCM is 60 times the HCF and one of the numbers is 70, then the other number is: