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__Practice Sets on Number Sequence | IBPS PO Mains Spl – Download in PDF__Dear Readers, Here we have given the important practice set questions on Number Sequence, aspirants those who are preparing for the examination can also download in pdf and make use of it.

**1).**How many such pairs of digits are there in the number 421579368 each of which has as many digits between them in the number as when they are arranged in ascending order?

a) One

b) Two

c) Three

d) More than three

e) None

**2).**How many 4’s are there preceded by 7 but not followed by 3?

**5 9 3 2 1 7 4 2 6 9 7 4 6 1 3 2 8 7 4 1 3 8 3 2 5 6 7 4 3 9 5 8 2 0 1 8 7 4 6 3**

a) Three

b) Four

c) Five

d) Six

e) None of these

**3).**How many such digits are there in the number 7346285 which are as far away from the beginning of the number, as they will be when arranged in ascending order within the number?

a) One

b) Two

c) Three

d) More than three

e) None

**4).**How many even numbers are there in the following sequence of numbers which are immediately followed by an odd number as well as immediately preceded by an even number?

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

a) 2

b) 3

c) 4

d) 5

e) 6

**5).**If the position of the first, sixth digits of the number 2796543018 are interchanged, similarly the positions of the second and seventh digits are interchanged and so on, which of the following will be the left of seventh digit from the left end?

a) 1

b) 7

c) 0

d) 8

e) 3

**6).**If the digits in the number 25673948 are arranged in ascending order from left to right, what will be the sum of the digits which are fourth from the right and third from the left in the new arrangement?

a) 10

b) 9

c) 8

d) 7

e) 6

**Directions (7 – 11): These questions are based on the following set of numbers:**

**276 652 564 473 739**

**7).**If 2 is added to the middle digit of each number and then the first and the second digits are interchanged, which of the following will be the third digit of the smallest number?

a) 6

b) 4

c) 3

d) 2

e) 9

**8).**If in each number the first and the third digit are interchanged which number will be the second largest number?

a) 276

b) 652

c) 564

d) 473

e) 739

**9).**The sum of which of the following three-digit numbers is not an odd number?

a) 652

b) 739

c) 564

d) 473

e) 276

**10).**If in each number all the three digits are arranged in ascending order within the number, which of the following numbers will be the second smallest number?

a) 564

b) 652

c) 276

d) 739

e) 473

**11).**If in each number the second and the third digits are interchanged, what will be the sum of the first and the third digit of the largest number?

a) 9

b) 8

c) 10

d) 12

e) 15

**12).**How many pairs of letters are there in the word LUMPENROLETARIAT which have the same number of letters between them as in English alphabet?

a) Seven

b) Eight

c) Nine

d) Ten

e) None of these

**Directions (13 – 15): Following questions are based on the five words given below:**

**LAP BUT CAR SON HID**

**13).**If the positions of the first and the third alphabets of each of the words are interchanged, which of the following would form a meaningful word in the new arrangement?

a) HID

b) SON

c) Both LAP and BUT

d) CAR

e) Both CAR and LAP

**14).**If in each of the words, each of the consonants is changed to its previous letter and each vowel is changed to its next letter in the English alphabetical series, in how many words thus formed will at least one vowel appear?

a) None

b) One

c) Two

d) Three

e) More than three

**15).**If the second alphabet in each of the words is changed to the next alphabet in the English alphabetical order, how many words having no vowels will be formed?

a) None

b) One

c) Two

d) Three

e) More than three

**Answer Key with Solutions:**

**1. C)**

Given Number: 4 2 1 5 7 9 3 6 8

Ascending order: 1 2 3 4 5 6 7 8 9

Hence the required pairs are 4-9, 1-2 and 3-6

**2. A)**

**3. B)**

Given number: 7 3 4 6 2 8 5

Ascending Number: 2 3 4 5 6 7 8

**4. D)**

We have to find out even number – even number – odd number sequence.

There are four such such even numbers: 6,8,2 and 8.

**5. A)**

The new number formed is 4 3 0 1 8 2 7 9 6 5

The seventh digit from the left is 7, the 3rd digit from the left of 7 is 1

**6. A)**

Given Number: 2 5 6 7 3 9 4 8

Ascending order: 2 3 4 5 6 7 8 9

Specified letters are 6 and 4 respectively.

Therefore, required sum = (4 + 6 =) 10

**7. E)**

**8. A)**

**9. D)**

**10. C)**

**11. C)**

**12. B)**

**13. C)**The given words are as follows:

LAP BUT CAR SON HID

When positions of first and third alphabets of each of the words are interchanged, we have

PAL TUB RAC NOS DIH

Clearly, PAL and TUB are the only meaningful words. These words are obtained from LAP and BUT respectively.

**14. D)**After making necessary changes, we have

KBQ AVS BBQ RPO GJC

Clearly, there are three words in which no vowel appears. These words are KBQ, BBQ and GJC.

**15. E**) When the second alphabet in each of the word is changed to the next alphabet in the English alphabetical order, we have

LBP BVT CBR NPS HJD

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