Directions:(1-5) Study the following information carefully and answer the questions given below.
256    426    543    394     683

1. For which two numbers the average of all the digits are same?

Ans:3
256 = (2+5+6)/3=13/3
426 = (4+2+6)/3= 12/3
543   = (5+4+3)/3= 12/3
394   = (3+9+4)/3 = 15/3
683  = (6+8+3)/3= 17/3
So, Answer is 426 and 543

2. If first and Third digit of each numbers is interchanged, then which is the second lowest number?

Ans:4

3. If all the digits in each number are arranged in Descending order, then which number will be the Third Highest after the rearrangement?

Ans:4
All the digits in each number are arranged in Descending order

4. What will be the product of Second digit of the highest number and third digit of third lowest number?

Ans:2
The first and third digits of the numbers are interchanged; similarly second and fourth digits of the numbers are interchanged,

Product is 8*6 = 48

5. If all the digits of a number are arranged from left end to right end in ascending order with no space between each digit, then which of the following number is seventh from the right end in newly formed series?

Ans:5
223334445566689
5 is seventh from the right end after the condition is applied.

Directions:(6-10) Study the following information carefully and answer the questionsgiven below
4 6 5 3 2 4 8 7 9 2 1 4 5 8 9 6 3 2 1 5 7 4 3 8 7 8 9 1 2 1 8 5

6. How many such 5’s are in the arrangement which is immediately preceded by multiple of 2?


Ans:3
There are three 5’s in the given arrangement which is immediately preceded by multiple of 2.

4 6 5 3 2 4 8 7 9 2 1 4 5 8 9 6 3 2 1 5 7 4 3 8 7 8 9 1 2 1 8 5

7. How many such 4’s in the given arrangement which is followed by a number less than 5?

Ans:1
There is only one, such 4’s in the given arrangement which is followed by a number less than 5.

4 6 5 3 2 4 8 7 9 2 1 4 5 8 9 6 3 2 1 5 7 4 3 8 7 8 9 1 2 1 8 5

8. If all the multiples of 3 are removed from the series then which of the following number is Sixteenth from the right end?

Ans:4
4 5 2 4 8 7 2 1 4 5 8 2 1 5 7 4 8 7 8 1 2 1 8 5
All the multiples of 3 are removed from the series then 4 is Sixteenth from the right end

9. How many such even numbers which is immediately preceded and followed by a prime number?

Ans:2
4 6 5 3 2 4 8 7 9 2 1 4 5 8 9 6 3 2 1 5 7 4 3 8 7 8 9 1 2 1 8 5
There are two such numbers in the given arrangements.

10. Which of the following number is sixth to the right of the number which is ninth from the left end?

Ans:2
4 6 5 3 2 4 8 7 9 2 1 4 5 8 9 6 3 2 1 5 7 4 3 8 7 8 9 1 2 1 8 5
9 are sixth to the right of the number which is ninth from the left end.

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5 thoughts on “Alphanumeric Series Questions for Competitive Exams”

  5. Emmett Ghibaudy

    Having read this I thought it was very informative. I appreciate you taking the time and effort to put this article together. I once again find myself spending way to much time both reading and commenting. But so what, it was still worth it!

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