Two-step function machines

Question 1

A function machine does: × 3, then − 12. What is the output when the input is 15?

Answer 

Question 2

Inputs 1, 3, 8 give outputs 11, 23, 53. The machine multiplies by 6 and then adds a number. What number is added?

Answer 

Question 3

A function machine does: × 3, then + 2. The output is 26. What was the input?

Answer 

Question 4

A function machine does: × 9, then + 4. What is the output when the input is 11?

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Question 5

Inputs 4, 10, 9 give outputs 33, 69, 63. The machine multiplies by 6 and then adds a number. What number is added?

Answer 

Question 6

A function machine does: × 5, then + 3. The output is 68. What was the input?

Answer 

Question 7

A function machine does: × 9, then − 8. What is the output when the input is 7?

Answer 

Question 8

Inputs 7, 5, 10 give outputs 17, 13, 23. The machine multiplies by 2 and then adds a number. What number is added?

Answer 

Question 9

A function machine does: × 4, then + 18. The output is 66. What was the input?

Answer 

Question 10

A function machine does: × 6, then − 7. What is the output when the input is 15?

Answer 

Question 11

Inputs 2, 8, 4 give outputs 11, 23, 15. The machine multiplies by 2 and then adds a number. What number is added?

Answer 

Question 12

A function machine does: × 2, then + 2. The output is 14. What was the input?

Answer 

Question 13

A function machine does: × 6, then + 11. What is the output when the input is 10?

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Question 14

Inputs 1, 9, 2 give outputs 7, 55, 13. The machine multiplies by 6 and then adds a number. What number is added?

Answer 

Question 15

A function machine does: × 8, then + 3. The output is 35. What was the input?

Answer 

Question 16

A function machine does: × 6, then − 8. What is the output when the input is 2?

Answer