HBS Logical Reasoning 3

Question 1

All mammals are warm-blooded. Dolphins are mammals. Which conclusion must be true?

Accepted Answer

Dolphins are warm-blooded

Answer

By applying the syllogism, since all mammals are warm-blooded and dolphins are mammals, dolphins must be warm-blooded.

Question 2

A pattern repeats every 4 tiles: ★ ● ▲ ■. What is the 23rd tile in the pattern?

Accepted Answer

▲

Answer

23 ÷ 4 = 5 remainder 3; the 3rd tile in the pattern is ▲.

Question 3

Jane has more stickers than Paul. Paul has fewer stickers than Raj. Raj has fewer than Jane. Who has the most stickers?

Accepted Answer

Jane

Answer

Jane > Raj > Paul is consistent with all clues, making Jane the one with the most stickers.

Question 4

Which of these fractions is the largest: 3/4, 2/3, 5/8, 7/10?

Accepted Answer

3/4

Answer

Converting to decimals: 3/4=0.75, 2/3≈0.667, 5/8=0.625, 7/10=0.70; so 3/4 is largest.

Question 5

In a library, fiction books outnumber non-fiction by 3 to 1. If there are 240 books in total, how many are fiction?

Accepted Answer

180

Answer

Fiction : Non-fiction = 3:1, so fiction = 3/4 × 240 = 180.

HBS - Henrietta Barnett School Practice Test