IF 1 + 1 = 5
2 + 2 = 20
3 + 3 = 45
Then, 4 + 4 = ?
Answer is 80
How?
Multiply the two numbers and then multiply the result by 5.
Number Puzzle #31
Number Puzzle #30
16, 43, 27
11, 36, 25
29, 56, ?
Missing number is 27.
How?
Number in middle column is sum of the respective numbers in first and third column. thus the missing number should be 56 – 29 = 27.
Number Puzzle #29
IF 1 = 3
2 = 6
3 = 9
4 = 12
Then, 5 = ?
Answer is 15
How?
Its simple, just multiply the number by 3.
Number Puzzle #28
IF 1+2 = 3
3 + 4 = 21
5 + 6 = 55
Then 4 + 5 = ?
Answer is 36
Explanation:
1 + 2 => (1)^2 + (1*2) = 3
3 + 4 => (3)^2 + (3*4) = 21
5 + 6 => (5)^2 + (5*6) = 55
Thus 4 + 5 => (4)^2 + (4*5) = 36
Number Puzzle #27
13, 25, ?
16, 28, 35
19, 31, 28
What is the missing number.
Answer is 32
How?
If you see the rows every next number = previous number in the row +3.
Number Puzzle #26
Find the missing number
This puzzle is courtesy 
, shared on puzzlersworld facebook page.
See Answer
Answer is 2
How?
7*6 = 4 2
9*9 = 8 1
5*3 = 1 5
6*2 = 1 2
Number Puzzle #25
Whats the missing number in the triangle
Answer is 125
Number Puzzle #24
number puzzle 24
Answer is 90.
How?
Number on the bigger line is the multiplication of the numbers on the adjacent smaller lines, thus the answer should be 10*9=90.
Number Puzzle #23
Find the missing number
Answer is 36
How?
Actually number on the right side is the square of the exact opposite number.
thus the missing number should be 6^2.
Number Puzzle #22
Find the missing number
Answer is 10
How?
There is gap of 4 between numbers
8+4 = 12
3+4 = 7
9-5 = 4
simillarly
?-4 = 6=> ?=10
NOTE: there is a better and shorter explanation(suggested by Guestlogic in comment), opposite numbers sum is 15, that’s why answer should be 15 – 5 = 10
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