Logical Reasoning — Chapter Test | Class 8 IMO

Q1

Find the next term: 3, 9, 27, ___ ?

Each term is ×3: 27 × 3 = 81.

Q2

Find the next term: 1, 4, 9, 16, ___ ?

Square numbers: 5² = 25.

Q3

If + means ×, then 3 + 4 = ___ ?

Replace + with ×: 3 × 4 = 12.

Q4

If × means −, then 9 × 4 = ___ ?

Replace × with −: 9 − 4 = 5.

Q5

If each letter moves forward by 3, the code for CAT is ___ ?

C→F, A→D, T→W gives FDW.

Q6

If each letter moves forward by 1, the code for DOG is ___ ?

D→E, O→P, G→H gives EPH.

Q7

Your mother's brother is your ___ ?

A mother's brother is an uncle.

Q8

Facing East and turning left, you face ___ ?

Turning left from East faces North.

Q9

In a 3-set Venn diagram, items common to all sets lie in the ___ ?

The centre overlap belongs to all three sets.

Q10

Complete the series: Z, X, V, ___ ?

Going back skipping one letter: Z, X, V, T.

Q11

A clock shows 9:00. What is the angle between its hands?

At 9:00 the hands are 90° apart.

Q12

A man walks 5 km North, then 5 km East. In which direction is he from the start?

North and East combine to North-East.

Q13

Find the next term: 2, 5, 11, 23, ___ ?

Each term is ×2 + 1: 23 × 2 + 1 = 47.

Q14

If A = 1, B = 2, …, Z = 26, what is the sum of the letters in 'CAB'?

C + A + B = 3 + 1 + 2 = 6.