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Question

Find the missing number: $8 : 27 :: 64 : ?$

This question was previously asked in
SSC CGL 2025 Tier 1 Question Paper (25-Sep-2025) (Shift 3)
The correct answer is
125

Analogy Pattern Analysis

The question presents a number analogy: $8 : 27 :: 64 : ?$. We need to find the relationship between the numbers.

  • Look at the first pair: $8$ and $27$.
  • Notice that $8 = 2^3$ (2 cubed) and $27 = 3^3$ (3 cubed).
  • The pattern involves the cubes of consecutive integers ($2$ and $3$).

Calculating Missing Term

Now, apply this pattern to the second pair, which starts with $64$.

  • Recognize that $64 = 4^3$ (4 cubed).
  • Following the established pattern of consecutive cubes, the next base number should be $4 + 1 = 5$.
  • Calculate the cube of $5$: $5^3 = 5 \times 5 \times 5 = 125$.
  • Therefore, the missing number in the analogy $8 : 27 :: 64 : ?$ is $125$.
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Important Questions from Analogy

  1. Select the option that is related to the third number in the same way as the second number is related to the first number.

    12 : 60 :: 16 : ?

  2. Select the option that is related to the third number in the same way as the second number is related to the first number.

    16 : 144 :: 28 : ?

  3. Select the set in which the numbers are related in the same way as are the numbers of the following sets.

    (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 - Operations on 13 such as adding / subtracting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)

    (42, 18, 3)

    (36, 14, 4)

  4. Select the option that is related to the fifth letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster and the fourth letter-cluster is related to the third letter-cluster.

    ABILITY : LIBAYTI : : CHRONIC : ORHCCIN : : HEAVILY : ?

  5. Select the set in which the numbers are related in the same way as are the numbers of the following set.

    (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits.)

    (4, 50, 6)

    (13, 128, 3)

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