For the following questions answer them individually
The number of divisors of 2160 which is of the form 3k, where k is a positive integer is
The LCM and GCD of two numbers are 4641 and 21 respectively. If one is greater than 300, then find the other number.
The ascending order of the following fractions
$$a = \frac{1}{2}; b = \frac{2}{9}; c = \frac{7}{13}; d = \frac{13}{18}$$ is
In a mixture of 450 kg of two food grains A and B, A is 15%. How much quantity of B (in kg) is to be added to this mixture so that A will be 5% in the resulting quantity?