MEDIUM
CAT
IMPORTANT
Earn 100

Find the difference between the average of the first $n$ even numbers and the average of all the even numbers up to n (n is an even number).

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Important Questions on Arithmetic

EASY
CAT
IMPORTANT
Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 5
I was born 30 years after my father was born. My sister was born 25 years after my mother was born. The average age of my family is 26.25 years right now. My sister will get married 4 years from now and will leave the family. Then, the average age of the family will be 1073 years. What is the age of my father?
MEDIUM
CAT
IMPORTANT
Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 10
A shipping clerk has to weigh six distinct packets. He weighs them four at a time, weighing all the possible combinations of the packets from the six. The average weight of all the weighing combinations is found to be 500 g. What is the combined weight of all the six packets?
EASY
CAT
IMPORTANT
Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 22
The average of five positive numbers is A. The average of the average of all the possible distinct triplets of these five numbers is B. Which of the following is true?
EASY
CAT
IMPORTANT
Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 23
The average of five positive numbers is A. The average of the average of all the possible distinct pairs of these five numbers is B. Which of the following is true?
EASY
CAT
IMPORTANT
Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 27
The average age of Mr and Mrs Sinha at the time of their marriage in1972 was 23 years. On the occasion of their anniversary in 1976, they observed that the average age of their family had come down by 4 years compared to their average age at the time of their marriage. This was due to the fact that their son Vicky was born during that period. What was the age of Vicky in 1980 ?
EASY
CAT
IMPORTANT
Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 28
A man makes 60 articles in the first hour. His efficiency decreases by 25% in the second hour, increases by 40% in the third hour, decreases by 33% in the fourth hour and increases by 50% in the fifth hour. If he has to work for more than one hour, then in which hour the average number of articles produced per hour then would be minimum?
EASY
CAT
IMPORTANT
Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 29
Sachin Tendulkar has a certain batting average N (a whole number) in his career of 86 innings. In the 87 th inning, he gets out after scoring 270 runs which increascs his batting average by a whole number. The batting average is calculated by dividing the total number of runs scored by the total number of innings played by the player. How many values of his new average is/are possible?
EASY
CAT
IMPORTANT
Quantitative Aptitude for the CAT>Chapter 2 - Arithmetic>Practice Exercises>Q 30
In a school, there are two sections for class X - section A and section B. The number of students in section A and section B are 60 and 70, respectively, and their respective average weight is 35 kg and 38 kg. If one of the students from section A is shifted to section B then the average weight of both the sections decreases. What can be said about the weight of that student?