IQ Master 2022: Round 4

19, 20, 21, ?, ?, 26, 28, 32, 33, 40

Which two numbers should replace the question marks?

• 22, 23

• 22, 24

• 23, 25

• 22, 25

Answer explanation

Answer – 22 and 24: there are two interwoven sequences. Starting at 19, alternate numbers progress +2, +3, +4, +5. Starting at 20, alternate numbers progress +2, +4, +6, +8

Which set of symbols should replace the question marks?

• 
• 
• 
• 
• 

Answer explanation

Each line moves 45° clockwise from top to bottom

Which number is the odd one out?

84129, 32418, 47632, 36119, 67626, 72927

• 84129

• 32418

• 47632

• 36119

Answer explanation

47632: all the others are three-digit numbers followed by their square root, eg 361 followed by its square root, 19.

4, 45, 11.3, 41.3, ?, ?, 25.9, 33.9

Which two numbers should replace the question marks?

• 18.3, 36.6

• 40, 39.7

• 18.6, 37.6

• 37.6, 18.3

Answer explanation

18.6, 37.6. There are two interwoven sequences: starting at 45 alternate numbers are –3.7. Starting at 4 alternate numbers are +7.3

329 : 15 746 : 34

Which numbers below have the same relationship to each other as the two sets of numbers above?

• 287 : 22

• 698 : 62

• 942 : 68

• 382 : 12

• 749 : 35

Answer explanation

698 : 62. (6 × 9) + 8 = 62.

In the two numerical sequences below, one number that appears in the top sequence should appear in the bottom sequence and vice versa. Which two numbers should be changed round?

2, 5, 11, 15, 47

3, 7, 23, 31, 63

• 2 and 3

• 11 and 23

• 15 and 23

• 47 and 31

Answer explanation

15 and 23 should be exchanged. Both sequences progress × 2 + 1.

24, 30, ? , 60, 84, 114

What number should replace the question mark?

• 36

• 42

• 48

• 54

Answer explanation

The sequence progresses +6, +12, +18, +24, +30.

Which set of symbols should replace the question marks?

• 
• 
• 
• 
• 

Answer explanation

All black dots change to a horizontal line, all white dots are unaffected.

1, 2, 0, 3, ?, 4, ?

What two numbers should replace the question marks?

• -2, 5

• -1, 3

• -1, -2

• -1, -3

Answer explanation

–1 and –2: the sequence progresses +1, –2, +3, –4, +5, –6.

Which two squares are missing?

• 
• 
• 
• 
• 

Answer explanation

In each line both across and down, one of the three rings is black.