247SimpleTests
ASVAB · Exponents and Roots

What is 2⁵?

Reviewed by Jordan Morley, Editorial Lead at 247SimpleTests. Written by the 247SimpleTests Editorial Team from the official source material cited on every question.

Correct answer

32

  1. A 25
  2. B 10
  3. C 16
  4. D 32

Why this is the answer

2⁵ means 2 multiplied by itself 5 times: 2 × 2 × 2 × 2 × 2 = 4 × 2 × 2 × 2 = 8 × 2 × 2 = 16 × 2 = 32. Memorize common powers: 2⁰ = 1, 2¹ = 2, 2² = 4, 2³ = 8, 2⁴ = 16, 2⁵ = 32, 2⁶ = 64, 2⁷ = 128, 2⁸ = 256, 2⁹ = 512, 2¹⁰ = 1024. Also: 3² = 9, 3³ = 27, 3⁴ = 81; 4² = 16, 4³ = 64; 5² = 25, 5³ = 125. Exponent rules: (1) a^m · a^n = a^(m+n); (2) a^m / a^n = a^(m−n); (3) (a^m)^n = a^(m·n); (4) a⁰ = 1 (for a ≠ 0); (5) a^(−n) = 1/a^n; (6) a^(1/n) = ⁿ√a (the n-th root); (7) (ab)^n = a^n · b^n; (8) (a/b)^n = a^n / b^n. Common error: 2⁵ ≠ 2 × 5 = 10. Exponents are repeated multiplication, not multiplication.
Source: ASVAB Math Knowledge — Exponents

Practice more questions

This question is from our ASVAB Practice Tests practice test. Take the full practice test to test your knowledge across all Exponents and Roots and other topics.

Take the Mathematics Knowledge practice test →

About this topic: Exponents and Roots

Exponents and roots questions cover the laws of exponents (adding when multiplying, multiplying when raising a power to a power), negative and zero exponents, scientific notation, and simplifying square roots. This is one of 10 Mathematics Knowledge questions on exponents and roots, each with a full explanation on a single study page.

New to this exam? Our ASVAB exam guide explains the format, scoring, and how to prepare.

Related questions

Exponents and Roots

Simplify: √48

 Exponents and Roots

What is x⁻² when x = 4?

 Exponents and Roots

Simplify: (3x²)(4x³)

 Exponents and Roots

What is 4³?

Recommended study materials

Study guide

ASVAB Total Prep (Kaplan)

Kaplan's complete ASVAB guide with 1,000+ practice questions, 6 full-length tests, and AFQT focus.

Check Price → Study guide

Barron's ASVAB with Online Tests 12th Ed.

Comprehensive ASVAB review for all nine subtests with full-length practice exams and online tools.

Check Price → Study guide

ASVAB for Dummies 4th Ed. (Wiley)

Accessible, thorough ASVAB prep covering all subtests with tips for boosting your AFQT score.

Check Price →

As an Amazon Associate, CJ Affiliate, and AWIN publisher we earn from qualifying purchases. Links above are affiliate links. Full disclosure →