Question
Which of the following is a nitrogen-fixing
bacteria?Solution
Rhizobium is a nitrogen-fixing bacteria as it fixes nitrogen after it gets established in the root nodules of leguminous plants.
The sum of the present ages of Tina and her father is 50 years. Tina's father is 4 years older than her mother, and two years ago, Tina's mother's age w...
Sum of the present ages of A, B, C and D is 40 years. After 3 years ratio of their ages is 5:3:2:3. What is C’s present age?
The average age of a group of 70 students is 14 years. If three students whose ages are 22 years, 20years, ________ years are replaced with th...
What is the value of 'x' such that, given their current ages are in a 3:7 ratio, 'x' years ago, the ratio of 'Adarsh' and 'Malik's ages was 1:3, and if ...
- Three years ago, the ratio of ages of 'S' and 'T' was 7:8. Seven years from today, their ages will be in the ratio 9:10. What is the present age of 'R', wh...
Eight years ago, the sum of the ages of Helen and Karen was 50 years. Eight years hence, the ratio of their ages will be 9:11. Find the current age of H...
The edge length of a regular tetrahedron is 10 cm. What is its volume?
- Meena is eight years older than Sita. Eight years ago, three times the age of Sita is 15 more than the age of Meena. Find the present age of Sita.
Present age of ‘A’ is 25% more than that of ‘B’. If 16 years hence from now, ‘B’ will be 9 years younger than ‘A’, then find the sum of ...
Present age of Anil is 20% less than that of Bijender and 5 years hence from now, the ratio of Bijender and Shinu’s age will be 2 : 3 respectively. If...
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