Denitrifying bacteria , microorganisms whose action results in the conversion of nitrates in soil to free atmospheric nitrogen, thus depleting soil fertility and reducing agricultural productivity.
‘A’ is 4 years younger than ‘B’ and 6 years elder than ‘C’. If the present age of ‘B’ and ‘D’ is 28 years and 20 years, respectively...
The average of present ages of Rajesh and his father is 45 years. The age of Rajesh 5 years hence from now will be 1/4 of the pre...
The ages of A, B and C together are 54 years. B is twice as old as A and C is 6 years older than A. What is the difference between ages of B and C?
Mahesh said to his son, “At the time of your birth” I was as old as you are at present. If the Mahesh’s age is 42 years now then what will be the ...
B is 5 years older than A and A is 8 years older than C. If the sum of the age of A and C is 24 years, then find the sum of the ages of all three.
A is 3 years older than B while C is 4 years younger than B. The ratio of age of A, 6 years hence and age of B, 4 years ago is 3:2. What was age of C, 1...
The average age of a group of 30 men is 32 years. Five men, whose average age is 24 years, leave the group. What is the new average age of the remainin...
In a family of four persons, the father’s age is 8 times the age of the daughter. The son is half as old as his mother and is 15 years older than ...
The present average age of ‘X’ and ‘Y’ is 16 years, present average age of ‘X’ and ‘Z’ is 56 years and present average age of ‘Y’ an...
Shalini is younger than Rashi by 3 years. If the ratio of Shalini and Rashi ages is 9:10 respectively, then find the age of Shalini.
