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IQ Test Ages 2–90 (children 2–18)

Free Stanford-Binet Practice Test

The Stanford-Binet Intelligence Scales, Fifth Edition (SB5) is one of the most respected IQ tests in the world. Administered by a licensed psychologist, it measures five cognitive factors — fluid reasoning, knowledge, quantitative reasoning, visual-spatial processing, and working memory — and produces a Full Scale IQ (FSIQ) score.

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Ages 2–90
Age Range
5 Factors
Cognitive Areas
45–75 Min
Test Duration
FSIQ Score
Score Format

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Everything You Need to Prepare

Practice Questions
50 free questions
Skill Boosters
5 key terms
Study Guide
On this page
Books
2 study guides
Articles
2 guides

Test Structure

What the SB5 Covers

The SB5 assesses five cognitive factors, each with both verbal and nonverbal tasks. This dual-domain design makes it one of the most comprehensive and fairest IQ tests available.

Fluid Reasoning

Measures novel problem-solving without relying on prior knowledge — the purest measure of intelligence. Includes verbal and nonverbal tasks: inductive reasoning (finding rules from patterns) and deductive reasoning (applying rules to problems).

Knowledge + Quantitative Reasoning

Knowledge tests vocabulary and general information. Quantitative Reasoning measures mathematical problem-solving and numerical reasoning. Both sections have verbal and nonverbal formats, making the SB5 fair across language backgrounds.

Visual-Spatial & Working Memory

Visual-Spatial tests ability to perceive spatial relationships and form/pattern recognition. Working Memory assesses how much information a child can hold and manipulate — a key predictor of academic performance.

Study Strategy

Prep Tips for Parents

1
Prepare for the 1-on-1 format

The SB5 is administered individually by a psychologist — unlike group tests. Make sure your child is comfortable with adult-directed one-on-one activities.

2
Don't coach answers

An accurate FSIQ helps the psychologist understand your child and make good recommendations. Coaching artificially inflated scores undermines the test's diagnostic value.

3
Rest and eat well before testing

Cognitive performance is measurably affected by sleep and nutrition. The day before testing matters. No late nights or skipped breakfasts.

4
Pace for 45–75 minutes

The SB5 takes 45–75 minutes for most children. Let your child know ahead of time — knowing what to expect reduces anxiety and improves performance.

5
Request the full score report

The FSIQ is just the headline. The subtest breakdown reveals where your child is strongest and weakest — far more useful for educational planning.

Study Materials

Recommended Books

Handpicked study guides to complement your online practice. Affiliate links — we earn a small commission at no extra cost to you.

Gifted Children IQ Assessment Book

Assessing Gifted Children: A Practical Guide for Parents

What IQ tests measure, how to read score reports, and how to advocate for your child in gifted programs and schools.

Smart But Stuck Book

Smart But Stuck: Unlocking Your Child's Potential

For families navigating twice-exceptional children or unexpected IQ assessment results — how to move from testing to action.

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Sample Question Verbal

Doctor is to Hospital as Teacher is to ___

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Stanford-Binet Articles

Score Guide

Stanford-Binet V Scores Explained: What Does Your Child's FSIQ Mean?

A parent-friendly guide to SB5 FSIQ classifications, percentile ranks, and what gifted scores look like.

Read article → Comparison

WISC-V vs Stanford-Binet V: Which IQ Test Is Right for Your Child?

The two most widely used IQ tests for children — how they differ and when psychologists choose one over the other.

Read article →

View all articles →

Common Questions

Frequently Asked Questions

What is the Stanford-Binet V?

A comprehensive IQ test measuring 5 cognitive factors, used for gifted identification, learning disability assessment, and educational planning. Ages 2–90.

How is SB5 different from WISC-V?

Both measure IQ; WISC-V is more commonly used for school-age children. SB5 has broader age range and is sometimes preferred for very young children or extremely gifted children (higher ceiling).

What is a gifted score on the SB5?

FSIQ 130+ (98th percentile) is typically "highly gifted"; 125+ qualifies for most gifted programs.

Who administers the Stanford-Binet?

Always a licensed psychologist or trained school psychologist — never self-administered.

Can you prepare for the SB5?

Minimally — the SB5 measures cognitive ability, not learned knowledge. Brief familiarization with the format is fine; intensive drilling is counterproductive.

What to Expect

Sample Stanford-Binet 5 Question Types

The SB5 is administered one-on-one by a licensed psychologist. It measures five cognitive factors, each through both a Verbal and a Nonverbal subtest — making it one of the most comprehensive IQ assessments available.

Fluid Reasoning – Verbal"What rule connects these: ice, steam, and liquid water?" Show answer ▾

✓ All are forms (states) of water

Verbal Fluid Reasoning questions require abstract categorization expressed in words. Strong answers name the abstract principle (states of matter, forms of energy) rather than a surface similarity. Children with strong science backgrounds find these particularly accessible.

Fluid Reasoning – NonverbalA 5×5 matrix of shapes with one missing. Which shape completes the pattern? Show answer ▾

✓ The shape satisfying both the row and column rule simultaneously

The SB5 uses 5×5 grids (more complex than the NNAT's 3×3). Multiple rules may operate simultaneously. This is one of the most diagnostically powerful subtests for identifying high reasoning ability in children who struggle with verbal expression.

Knowledge – Verbal"Who wrote Romeo and Juliet?" / "What is the capital of Australia?" Show answer ▾

✓ Shakespeare / Canberra

The Knowledge factor measures crystallized intelligence — accumulated learning and general knowledge. Unlike fluid reasoning, this is meaningfully developed through reading, conversation, and exposure to diverse subjects. Children who read voraciously and have had rich educational experiences score well here.

Quantitative ReasoningIf you have $1.75 and spend $0.50, how much is left? What is 20% of 80? Show answer ▾

✓ $1.25 / 16

Quantitative Reasoning tests mathematical problem solving and number concepts — not computation speed. A high score here alongside strong Fluid Reasoning often indicates mathematical giftedness. Questions begin simple and escalate to require algebraic and proportional reasoning.

Working MemoryRepeat these numbers in reverse order: 8, 3, 6, 2 Show answer ▾

✓ 2, 6, 3, 8

A significant discrepancy between high Fluid Reasoning and lower Working Memory on the SB5 is a common profile for twice-exceptional children — those who are both gifted and have a learning or attention difference. This pattern should be explicitly discussed with the evaluating psychologist.

Score Guide

Understanding Stanford-Binet 5 Scores

The SB5 reports a Full Scale IQ (FSIQ), a Nonverbal IQ (NVIQ), a Verbal IQ (VIQ), and five Factor Index scores — all with mean 100 and standard deviation 15.

The Extended IQ Scale — unique to the SB5

The SB5 Extended IQ scale can measure scores above 160 — something no other major IQ test does. This makes it the assessment of choice for profoundly gifted children, for whom WISC-V scores top out at 160 and cannot differentiate among the highest performers.

If a child scores at or near the ceiling of the WISC-V (FSIQ 155–160), a follow-up SB5 evaluation is often recommended. Organizations like the Davidson Institute use SB5 Extended IQ scores as part of their identification criteria for profoundly gifted children.

120+
Superior (90th percentile)
130+
Gifted (98th percentile)
145+
Highly gifted (>99.8th pct.)