Number System & Average MCQs for CET 12th Level
Practice 20 free Number System & Average questions under Arithmetic — Maths.
Strengthen your Number System & Average knowledge for CET 12th Level with curated MCQs. Switch between Hindi and English anytime.
CET 12th Level — Arithmetic — Number System & Average
20 Questions • Instant results & explanations • Hindi & English
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Question 1 of 20
The mean of 100 observations was calculated as 49. It was later discovered that three observations taken as 40, 20, 50 were actually 60, 70, 80 respectively. What is the correct mean?
Question 2 of 20
In a zoo, there are rabbits and pigeons. If heads are counted, there are 200, and if legs are counted, there are 580. How many pigeons are there?
Question 3 of 20
The average of 50 numbers is 36. It was later found that a number 48 was wrongly read as 23. Find the correct average.
Question 4 of 20
A number when divided by 899 leaves a remainder of 63. What will be the remainder when the same number is divided by 29?
Question 5 of 20
A batsman makes a score of 87 runs in the 17th inning, and thus increases his average by 3. Find his average after the 17th inning.
Question 6 of 20
Which of the following fractions is the largest: 3/4, 4/5, 5/6, 6/7?
Question 7 of 20
The mean of 100 observations was calculated as 49. It was later discovered that three observations taken as 40, 20, 50 were actually 60, 70, 80 respectively. The correct mean is:
Question 8 of 20
The average of 5 numbers is 27. If one number is excluded, the average becomes 25. The excluded number is:
Question 9 of 20
What is the unit digit of 3^45?
Question 10 of 20
The average of 50 numbers is calculated as 40. Later it was found that one number 45 was wrongly read as 20. What is the correct average?
Question 11 of 20
A can do a piece of work in 10 days and B in 15 days. They work together for 4 days. What fraction of the work is left?
Question 12 of 20
The average of 10 numbers is 30. If one number 15 is incorrectly read and replaced by 45, what will be the new average?
Question 13 of 20
A batsman scores 87 runs in his 17th inning, thereby increasing his average by 3. What is his current average after the 17th inning?
Question 14 of 20
A batsman makes a score of 108 runs in his 11th inning and thereby increases his average by 6. What is his new average?
Question 15 of 20
A batsman in his 12th innings makes a score of 63 runs and thereby increases his average by 2. What is his average after the 12th innings?
Question 16 of 20
What is the value of 0.6̅ + 0.3̅ ?
Question 17 of 20
The sum of two numbers is 20 and their difference is 4. Find the product of the two numbers.
Question 18 of 20
The average age of a class of 30 students is 15 years. If the teacher's age is included, the average becomes 16 years. What is the teacher's age?
Question 19 of 20
What is the smallest prime number?
Question 20 of 20