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Free CogAT Practice Test — Grade 8

Real-format sample questions with answers and explanations, matched to the grade 8 CogAT.

In grades 6–8 (CogAT Levels 12–13/14), reasoning gets more abstract: compound figure transformations, academic vocabulary, and multi-step quantitative rules. The CogAT has three batteries — Verbal, Quantitative, and Nonverbal — and the samples below include all three. Every question follows the official format: five answer choices, one correct answer.

Grade 8 sample questions

Verbal · Sentence Completion easy

Question 1. Everyone trusted Nia because she was always ___.

  1. Ahonest
  2. Bquiet
  3. Cfast
  4. Dtall
  5. Elate
Show answer & explanation
Answer: A — honest. "honest" fits the meaning of the sentence.
Verbal · Sentence Completion medium

Question 2. The opposite of transparent is ___.

  1. Anatural
  2. Bpermanent
  3. Ccontract
  4. Dopaque
  5. Earrogant
Show answer & explanation
Answer: D — opaque. transparent and opaque are opposites.
Quantitative · Number Series easy

Question 3. What number comes next? 271 321 371 421 471 ▢

  1. A571
  2. B521
  3. C421
  4. D522
  5. E471
Show answer & explanation
Answer: B — 521. The pattern is add 50 each time. 471 + 50 = 521.
Quantitative · Number Series medium

Question 4. What number comes next? 16 19 24 31 40 ▢

  1. A50
  2. B53
  3. C49
  4. D51
  5. E52
Show answer & explanation
Answer: D — 51. The amount added grows by 2 each time (+3, +5, ...). Next: 40 + 11 = 51.
Nonverbal · Figure Matrices easy

Question 5. Look at how the top figure changes from the first box to the second box. Choose the picture that belongs in the empty space.

?
  1. A
  2. B
  3. C
  4. D
  5. E
Show answer & explanation
Answer: E. In the top row, three copies of the shape appear. The same change must happen to the bottom figure.
Nonverbal · Figure Matrices hard

Question 6. Look at how the top figure changes from the first box to the second box. Choose the picture that belongs in the empty space.

?
  1. A
  2. B
  3. C
  4. D
  5. E
Show answer & explanation
Answer: D. In the top row, the shape rotates a quarter turn AND gets bigger. The same change must happen to the bottom figure.