Number System & Average MCQs for RAS
Practice 20 free Number System & Average questions under Arithmetic — Maths.
Strengthen your Number System & Average knowledge for RAS with curated MCQs. Switch between Hindi and English anytime.
RAS — Arithmetic — Number System & Average
20 Questions • Instant results & explanations • Hindi & English
0 / 20
Question 1 of 20
A batsman in his 10th innings makes a score of 80 runs, and thereby increases his average by 2 runs. What was his average after the 10th innings?
Question 2 of 20
Find the next term in the series: 5, 11, 23, 47, ?
Question 3 of 20
While evaluating the expression [(8 - 5) ÷ {(4 - 2) + (2 + 8/13)}], what is the exact intermediate numerical value of the entire denominator component encapsulated within the curly braces?
Question 4 of 20
The sum of two numbers is 20 and their difference is 4. Find the product of the two numbers.
Question 5 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 6 of 20
Two numbers are in the ratio 3:4. If their LCM is 84, find the largest number.
Question 7 of 20
The average of 11 numbers is 50. If the average of the first 6 numbers is 49 and that of the last 6 is 52, find the 6th number.
Question 8 of 20
How many total positive factors does the number 120 have?
Question 9 of 20
If the expression [(8 - 5) ÷ {(4 - 2) + (2 + 8/13)}] is mathematically modified by removing the fraction 8/13 entirely from the equation, what will be the new resulting value?
Question 10 of 20
What is the smallest prime number?
Question 11 of 20
The average age of 10 men increases by 2 years when a 20-year-old man is replaced by a new man. What is the age of the new man?
Question 12 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 13 of 20
The average age of a class of 30 boys is 15 years. If the teacher's age is included, the average age increases by 1 year. What is the age of the teacher?
Question 14 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 15 of 20
Which of the following fractions is the largest: 3/4, 4/5, 5/6, 6/7?
Question 16 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 17 of 20
The average age of 10 persons increases by 2 years when a person aged 25 years is replaced by a new person. What is the age of the new person?
Question 18 of 20
The average age of A and B is 20 years, B and C is 19 years, and A and C is 21 years. What is the age of A?
Question 19 of 20
What is the unit digit in the product (3^65 × 6^59 × 7^71)?
Question 20 of 20