Mensa IQ Spatial Reasoning and Patterns Flashcards

What comes next in the series: 1, 1, 2, 3, 5, 8, 13, ?

Answer: 21

This is the Fibonacci sequence where each number is the sum of the two preceding ones: 8+13=21.

Complete the analogy: Conductor is to Orchestra as General is to ___?

Answer: Army

A conductor leads an orchestra; a general leads an army. Both are leaders of large organized groups.

In a sequence of letters: Z, X, V, T, R, ?, the missing letter is:

Answer: P

The sequence skips one letter backwards each time: Z, Y(skip), X, W(skip), V, U(skip), T, S(skip), R, Q(skip), P.

If FISH is coded as GJTJ, what does BIRD become in the same code?

Answer: CJSE

Each letter is shifted forward by 1 position: B→C, I→J, R→S, D→E. BIRD becomes CJSE.

Some A are B. All B are C. Which conclusion is definitely true?

Answer: Some A are C

Since some A are B, and all B are C, those A that are B must also be C. So some A are C.

A clock shows 3:15. What is the angle between the hour hand and the minute hand?

Answer: 7.5°

At 3:15, the minute hand is at 90°. The hour hand has moved 15 minutes past 3, which is 90° + (15/60)×30° = 90° + 7.5° = 97.5°. Difference = 97.5° - 90° = 7.5°.

What number should replace the question mark? 4, 9, 25, 49, ?, 169

Answer: 121

The series is squares of prime numbers: 2²=4, 3²=9, 5²=25, 7²=49, 11²=121, 13²=169.