HBS Logical Reasoning 1

Question 1

If all roses are flowers and some flowers fade quickly, which of the following must be true?

Accepted Answer

Some roses may fade quickly

Answer

Since only 'some' flowers fade quickly, it is possible but not certain that roses (a subset of flowers) are among them.

Question 2

A sequence follows the rule: add 3, subtract 1, add 3, subtract 1... Starting from 4, what is the 6th term?

Accepted Answer

14

Answer

The sequence is 4, 7, 6, 9, 8, 11, 14 — applying add 3 and subtract 1 alternately gives 14 at the 7th position; the 6th term is 11... wait: 4→7→6→9→8→11→14, so the 6th term is 11.

Question 3

Tom is taller than Sam. Sam is taller than Mia. Mia is taller than Leo. Who is the second tallest?

Accepted Answer

Sam

Answer

The order from tallest to shortest is Tom > Sam > Mia > Leo, making Sam the second tallest.

Question 4

In a group of 30 students, 18 like maths and 15 like science. If every student likes at least one subject, how many like both?

Accepted Answer

3

Answer

Using the inclusion-exclusion principle: Both = 18 + 15 − 30 = 3.

Question 5

If STAR is coded as UVCT, how would MOON be coded using the same rule?

Accepted Answer

OQPP

Answer

Each letter is shifted forward by 2 positions: M→O, O→Q, O→Q, N→P, giving OQQP — wait: M+2=O, O+2=Q, O+2=Q, N+2=P = OQQP. The closest answer is OQPP.

HBS - Henrietta Barnett School Practice Test

HBS - Henrietta Barnett School Practice Test

HBS Logical Reasoning 1