### #1 - which number replaces the question mark puzzle

which number replaces the question mark?

30

Explanation:
As you can see the lower number rows are always bigger than upper row ones with the difference going up by 3 with every step

34 - 32 = 2
32 - 27 = 5 (difference going up by 3 from last difference)
56 - 48 = 8 (difference going up by 3 from last difference)
? - 19 = 11 (difference going up by 3 from last difference)
so ? = 30

### #2 - Which number replaces the question mark in the picture below

Can you find out the number that will replace the question mark?

4.

The 1st picture has 9 connecting dots / crossed lines.
The 2nd picture has one connecting dot / crossed line.
The last picture has 4 connecting dots / crossed lines.

### #3 - Maths Problem With 2 Answer

Can you solve the below maths equation problem by replacing the question mark with the correct number?

Note: It has more than one solution.

40 or 96

Explanation:
Solution A :
Add the rhs of the last line to the current line
1 + 4 = 5
5 + 2 + 5 = 12
12 + 3 + 6 = 21
21 + 8 + 11 = 40

Solution B :
RHS = 1ST NUMBER + (1ST NUMBER * 2ND NUMBER)
1 + (1 x 4) = 5
2 + (2 x 5) = 12
3 + (3 x 6) = 21
8 + (8 x 11) = 96

### #4 - Missing Number Table Puzzle

Find the missing number in the table below?

89

(1st-number * 2nd-number) + (1st-number + 2nd-number) = 3rd number.
(3 x 1) + (3 + 1) = 3 + 4 => 7
(6 x 4) + (6 + 4) = 24 + 10 => 34
(8 x 7) + (8 + 7) = 56 + 15 => 71
(9 x 8) + (9 + 8) = 72 + 17 => 89 ... (Answer)

### #5 - Replace Question Mark Puzzle

Replace the question mark with the two letters to complete the puzzle?

NE US RN ER RS TH US ?

RY

The list is formed by using last two letter of planet's names in the order from Neptune To Mercury

NEPTU:NE
URAN:US
SATU:RN
JUPIT:ER
MA:RS
EAR:TH
VEN:US
MERCU:RY

### #6 - Which number replaces the question mark

Which number replaces the question mark?

569

The Central number is formed by there greatest factor of 15 12 and 18
15=> 3 * 5 => greatest factor is 5
12=> 2 * 6 => greatest factor is 6
18=> 2 * 9 => greatest factor is 9.

### #7 - what number will replace

what number will replace "?" in the picture below?

24

Explanation:
21 * 4 - (4 * 4) = 68
12 * 4 - (4 * 4) = 32
17 * 4 - (4 * 4) = 52
10 * 4 - (4 * 4) = 24

### #8 - Tricky Number Sequence

Which number will replace the "?" and complete the sequence?

1 1 2 4 3 9 4 61 5 52 6 63 7 ?

94

Logic Used: The numbers are in pair and every second number is the reverse of 1st number.
1 -> 1
2 -> 4
3 -> 9
4 -> 61 (Reverse of 16)
5 -> 52 (Reverse of 25)
6 -> 63 (Reverse of 36)
7 ->94 (Reverse of 49)

### #9 - Missing Number Brain Teaser

By deducing the logic used in the table below, can you find the missing number?

52

For 1st column: 26 - 4 = 22
For 2nd column:37 - 5 = 32
For 3rd column:48 - 6 = 42

Missing number
59 - 7 = 52

### #10 - Next Term In Sequence

Which number comes next in the sequence
1 3 8 13 21 ?

17

1
3 = one (3 letters)
8 = three (5 letters) + one (3 letters)
13 = Eight (5 letters) + three (5 letters) + one (3 letters)
21 = Thirteen (8 letters) + Eight (5 letters) + three (5 letters) + one (3 letters)
17 = twentyOne (9 letters) + Thirteen(8 letters)