IBEW Aptitude Test Number Sequences and Functions Questions and Answers 2

Question 1

If f(x) = 3x + 5, what is f(7)?

Accepted Answer

26

Answer

f(7) = 3(7) + 5 = 21 + 5 = 26.

Question 2

Find the next two terms: 4, 8, 16, 32, ___

Accepted Answer

64, 128

Answer

Doubling sequence: 4, 8, 16, 32, 64, 128.

Question 3

If f(x) = x² - 4, find f(5).

Accepted Answer

21

Answer

f(5) = 5² - 4 = 25 - 4 = 21.

Question 4

What is the pattern rule for: 1, 3, 7, 15, 31, 63?

Accepted Answer

Multiply by 2 and add 1

Answer

Each term: ×2 + 1. Check: 1×2+1=3, 3×2+1=7, 7×2+1=15, 15×2+1=31, 31×2+1=63. Correct.

Question 5

If g(x) = 2x² + 3x - 1, what is g(0)?

Accepted Answer

-1

Answer

g(0) = 2(0)² + 3(0) - 1 = 0 + 0 - 1 = -1.

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