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The average of the first nine prime n...

The average of the first nine prime numbers is (a) 9 (b) 11 (c) `11 1/9` (d) `11 2/9`

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The mean of the first ten even natural numbers is (a) 9 (b) 10 (c) 11 (d) 12

Four prime numbers are arranged in ascending order. The product of first three is 385 and that of last three is 1001. The largest prime number is 9 (b) 11 (c) 13 (d) 17

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Show the following numbers on the number line.(a) 0.2 (b) 1.9 (c) 1.1 (d) 2.5

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Which of the following numbers are twin primes? 3,5 (b) 5,11 (c) 3,11 (d) 13,17

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RS AGGARWAL-AVERAGE-All Questions
  1. Find the average of all the numbers between 6 and 34 which are divi...

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  2. The average of the first five multiples of 3 is (a) 3         (b) 9...

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  3. The average of the first nine prime numbers is (a) 9 (b) 11 (c) 11 ...

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  4. A student was asked to find the arithmetic mean of the numbers 3, 1...

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  5. The average of 2, 7, 6 and x is 5 and the average of 18, 1, 6, x...

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  6. The total marks obtained by a student in Physics, Chemistry and Mat...

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  7. The average of the first 100 positive integers is (a) 49.5     (...

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  8. The average of odd numbers up to 100 is (a) 49      (b) 49.5     (c...

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  9. In a family, the average age of a father and a mother is 35 years. ...

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  10. The average of X1,\ X2 and X3 is 14. Twice the sum of X2 and X3 ...

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  11. The average of x1,\ x2,\ x3 and x4 is 16. Half the sum of x2,\ x...

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  12. If the mean of 5 observations x ,\ x+2,\ x+4,\ x+6 and x+8 is 11, t...

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  13. If the mean of a ,\ b ,\ c is M and a b+b c+c a=0 , then the mea...

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  14. The average of the two-digit numbers, which remain the same when th...

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  15. Company C sells a line of 25 products with an average retail price ...

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  16. The average sale of a car dealership was 15 cars per week. After a ...

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  17. The mean of 1^2,\ 2^2,\ 3^2,\ 4^2,\ 5^2,\ 6^2,\ 7^2 is (a) 10 (b) 2...

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  18. If a ,\ b ,\ c ,\ d ,\ e are five consecutive odd numbers, their ave...

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  19. The average of a non-zero number and its square is 5 times the numb...

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  20. Total of Arun’s marks in Sanskrit and Mathematics together are 80 m...

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