Question 1

A machine processes input numbers through a sequence of operations. Step 1: Multiply by 2. Step 2: Add 5. Step 3: Divide by 3. Step 4: Subtract 1. If the final output is 7, what was the original input?

Accepted Answer

This is a reverse input-output problem requiring students to work backwards through the operations in reverse order with inverse operations.

Question 2

A number input system works as follows: Input: 48. Step 1: Add the digits (4+8=12). Step 2: Multiply the result by 3 (12×3=36). Step 3: If the result is greater than 30, subtract 15; otherwise add 10. Step 4: Divide by 2 and round down. What is the final output?

Accepted Answer

This tests conditional logic in sequential operations, where Step 3's action depends on a comparison condition, requiring careful evaluation of the conditional branch.

Question 3

A machine processes pairs of numbers. Input: (6, 4). Step 1: Add them (6+4=10). Step 2: Subtract the smaller from the larger (6-4=2). Step 3: Multiply the Step 1 result by the Step 2 result (10×2=20). Step 4: If the final result is even, divide by 4; if odd, multiply by 3 and add 1. What is the final output?

Accepted Answer

This tests tracking of multiple intermediate results and applying conditional logic based on parity (even/odd) of a computed value.

Question 4

A machine processes input strings through three sequential operations: (1) Reverse the entire string, (2) Shift each letter by 2 positions forward in the alphabet (A→C, B→D, etc.), (3) Swap the first and last characters. If the input is 'LOGIC', what is the final output?

Accepted Answer

This tests sequential transformation tracking with multiple operations applied in strict order.

Question 5

In a coding system, numbers are transformed as follows: multiply by 3, subtract 5, divide by 2 (integer division), then add the number of digits in the result. Starting with 24, what is the final output?

Accepted Answer

Tests sequential arithmetic operations combined with a meta-operation (counting digits) applied at the end.

Question 6

A sequence is generated by the rule: if the number is even, divide by 2; if odd, multiply by 3 and add 1. Starting with 17, apply this rule repeatedly until you reach a number you've seen before. How many distinct numbers appear in this sequence (including the starting number)?

Accepted Answer

Tests cycle detection in iterative sequences and counting distinct elements without double-counting.

Question 7

A machine applies the following rule to a 3-digit number: (1) Add the digits, (2) Multiply the sum by the first digit, (3) If the result is greater than 100, subtract 50; otherwise, add 25. Starting with 247, what is the final output?

Accepted Answer

Tests conditional logic applied after arithmetic operations, requiring careful tracking of intermediate values.

Question 8

A sequence follows the rule: Output = (Input × 3) − 4. If the input is 6, what is the output?

Accepted Answer

Tests ability to apply a given formula correctly to compute output from input.

Question 9

In a coding system, every letter is shifted 2 positions forward in the alphabet. What is the code for the word 'CAT'?

Accepted Answer

Tests understanding of consistent character transformation rules in input-output sequences.

Question 10

A machine sorts numbers by the rule: If the number is even, divide by 2. If the number is odd, multiply by 3 and add 1. What is the output for input 7?

Accepted Answer

Tests conditional logic application in input-output systems with branching rules.

Question 11

A machine processes pairs of numbers using the rule: Output = (First number + Second number) × 2. If the input pair is (5, 3), what is the output?

Accepted Answer

Tests correct application of a formula involving multiple inputs and operation precedence.

Question 12

A word transformation rule states: Reverse the word, then capitalize the first letter. What is the output for the input 'hello'?

Accepted Answer

Tests sequential string manipulation operations in correct order.

SSC CPO Input-Output

SSC CPO Input-Output — Past Exam Questions

Input-Output— Rules & Concept

Key Points to Remember

Exam-Specific Tips

Input-Output — Practice Questions

60-Second Revision — Input-Output