Errata

Mock 2, item 8 — the item is on p. 167, the answer on p. 174

Options B and E are the same drawing

What is wrong. Options B and E carry what is, to the eye, one and the same figure. They are not identical in the file: option E is the same drawing set 4.2 pt — about 1.5 mm — further from the left edge of its panel, and that distance is exactly the attribute the item asks you to read (“how far the pair sits from the left edge”, named in the answer on p. 174). At the size the option is printed, that difference cannot be seen, so the item as printed offers two answers a reader cannot tell apart.

The correction. The correct answer is B, as printed on p. 174. Option E is a mis-set distractor: it was meant to sit at a visibly different distance from the left edge and does not. Read the item with four options — A, B, C and D — and B is the only one that satisfies every attribute at once: the circle is in front, the circle is black, there are no marks along the top edge, and the pair sits at the near position. If you answered E you were reading the same picture as B; nothing in your reasoning was wrong.

Reported by a reader on 22 September 2026, confirmed 23 September 2026.

Mock 2, item 7 — the answer on p. 173

Two wrong answers are given the same reason

What is wrong. “Why the others are wrong” reads “A — its fill is wrong; B — its fill is wrong” and “D — which node is coloured is wrong; E — which node is coloured is wrong”. Each sentence is true, but it does not separate the two options it is attached to, so the text reads as though two of the answers were the same answer.

The correction. The answer is C and does not change. Each wrong answer fails on its own value: A colours the node black and B colours it white, where the answer colours it grey; D colours the third node and E the first, where the answer colours the fourth.

Mock 2, item 9 — the answer on p. 174, continued on p. 175

Two wrong answers are given the same reason

What is wrong. “Why the others are wrong” reads “B — the hexagon’s fill is wrong; D — the hexagon’s fill is wrong”. The sentence does not separate B from D.

The correction. The answer is C and does not change. B’s hexagon is black and D’s is white, where the answer’s is grey.

Mock 1, item 8 — the answer on p. 161, continued on p. 162

Two pairs of wrong answers are given the same reason

What is wrong. “Why the others are wrong” reads “A — the sector’s fill is wrong … D — the sector’s fill is wrong”, and “B — the corner tick and how far the sector has opened are wrong … E — the corner tick and how far the sector has opened are wrong”. Neither sentence separates the two options it covers.

The correction. The answer is C and does not change. A’s sector is white and D’s is grey, where the answer’s is black. B and E are both missing the corner tick and both have the wrong opening, but not the same wrong opening: B has opened further than the answer, E has not opened as far.

Mock 1, item 1 — the item is on p. 153, the answer on p. 156, continued on p. 157

Two wrong answers are given the same reason

What is wrong. “Why the others are wrong” gives A and D one and the same sentence, word for word: “A — the corner mark and the little marks along the top edge are wrong … D — the corner mark and the little marks along the top edge are wrong”. Both sentences are true, but nothing in the text separates A from D, so the two read as if they were one answer.

The correction. The answer is B and does not change. A and D do both carry the corner mark, where the answer has none — that much they share. What separates them is the little marks along the top edge: A has none of them and D has one, where the answer has two.

Mock 1, item 4 — the item is on p. 154, the answer on p. 159

Two wrong answers are given the same reason

What is wrong. “Why the others are wrong” reads “A — the black block’s position along its band is wrong … E — the black block’s position along its band is wrong”. The two options are given the identical reason, so the text does not separate A from E.

The correction. The answer is B and does not change. A’s black block sits in the left-hand cell of its band and E’s sits in the middle cell, where the answer’s sits in the right-hand cell.

Mock 1, item 5 — the item is on p. 154, the answer on p. 159, continued on p. 160

Two wrong answers are given the same reason

What is wrong. “Why the others are wrong” reads “A — the hexagon’s fill is wrong … E — the hexagon’s fill is wrong”. The sentence does not separate A from E.

The correction. The answer is D and does not change. A’s hexagon is black and E’s is grey, where the answer’s is white.