All Exams Test series for 1 year @ ₹349 only
Question

Study the given pattern carefully and select the number that can replace the question mark (?) in it.
3?4
71218
695

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
9

The given sequence of numbers forms a 3x3 grid:

3 ? 4
7 12 18
6 9 5

Finding the Pattern

The pattern observed relates the sum of the elements in the first row to the sum of the elements in the first column.

  • Sum of the first row = $3 + ? + 4$
  • Sum of the first column = $3 + 7 + 6$

Calculation

According to the pattern, the sum of the first row must equal the sum of the first column:

$3 + ? + 4 = 3 + 7 + 6$

Combine the known numbers:

$7 + ? = 16$

Solve for the question mark (?):

$? = 16 - 7$

$? = 9$

Conclusion

Therefore, the number that can replace the question mark is 9.

Was this answer helpful?

Similar Questions

  1. Study the given pattern carefully and select the number from among the given options that can replace the question mark (?) in it.

  2. Study the given grid carefully and select the option from among the given options that can replace the question mark (?).
    $B_{3}$$E_{4}$$H_{7}$
    $K_{8}$$N_{9}$?
    $T_{11}$$W_{13}$$Z_{24}$
  3. Study the given pattern carefully and select the number from among the given options that can replace the question mark (?).
    4713
    5713
    69?
  4. Study the given pattern carefully and select the number from among the given options that can replace the question mark (?).

  5. Study the given pattern carefully and select the letter from among the given options that can replace the question mark (?).

  6. Study the given pattern carefully and select the number that can replace the question mark (?) in it.
    486480
    24?40
    121620
  7. Study the given pattern carefully and select the number that can replace the question mark (?) in it.

  8. Select the number from among the given options that can replace the question mark (?) in the given table.

    5815
    611?
    3596210
  9. Find the missing number.

    48248
    552011
    63?9
  10. Find the missing number.

    456
    544
    645
    1416?

Important Questions from Missing Number in Matrix

  1. Select the missing number from the given responses:

    1

    216

    343

    8

    125

    512

    27

    64

    ?

    35

    401

    1575

  2. Following is a matrix of certain entries. The entries follow a certain trend row-wise. Choose the missing entry (?) accordingly.

    7B10A3C
    3C9B6A
    10A13C?
  3. Study the given pattern carefully and select the number that can replace the question mark (?) in it.

    116160?
    3813
    742
  4. Find the missing number from the given responses in the following question.

    968
    584
    74?
    1127

  5. In the following question, from the given alternatives, select the number that comes in place of the question mark (?).

    16

    8

    13

    17

    12

    23

    21

    15

    19

    162

    105

    ?

Need Expert Advice?
Upcoming Exams
RRB Technician
October 06, 2026
RRB JE
October 27, 2026
RRB ALP
November 03, 2026
Test Series
RRB NTPC img
Railways
RRB NTPC Under Graduate 2026 New Mock Test Series
1580 Tests 2 Tests Free
544 Attempts
4.3(498)
English, Hindi, Telugu +7 More

Start Your Preparation with Prepp Mobile App

Download the app from Google Play & App Store
Download the app from Google Play & App Store
Prepp Mobile App