Question
What does a catalyst do in a
reaction?Solution
A catalyst speeds up a chemical reaction by lowering the activation energy needed for the reaction to proceed.
In a class of 40 students, the average weight of the class is 65 kg, but when one of the students left from the school and 6 new ...
Mr. X invested Rs. 600 in two schemes, A and B in the ratio of 7:3, respectively. Scheme A and B are offering simple interest at rate of 4% per annum an...
An athlete ran a certain average distance for 10 days. For the next 10 days, he ran 72 km per day, increasing his overall average by 6 km. What was his ...
Each question contains a statement followed by Quantity I and II. Read the information clearly and answer your questions accordingly.
Quan...
The average score obtained by 25 students in a class test is 68 marks. The top place was shared by 3 people who got the same score. If the lowest score ...
The average of six numbers is 82. When two more numbers are included, the average increases by 4. Find the average of the numbers included.
A set contains ten numbers. The average of the first six numbers is (x - 1), and the average of the last three numbers is (x + 6). The average of the en...
The average of five consecutive natural numbers is 14. What will be the average of the seven numbers if the next two natural numbers are also included?
The mean of a set of 15 numbers is 40. If the mean of the initial 5 numbers in this set is represented by the expression (12x + 10), and the mean of the...
The average age of 18 children and their teacher's age are 15 years. If the teacher's age is excluded, the average reduces by 2. What is the teacher's age?
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