The puzzles solutions 63-64-65

Brain teasers and puzzles

Questions collection

"Find the missing number"

By Panos Kalliantasis

PUZZLE 63

Correct answer is 14

Column AXB-C=D

8X4-16=32-16=16
5X7-18=35-18=17
3X7-7=21-7=14
9X3-13=27-13=14



PUZZLE 64

Correct answer is 8

Column ( A+B+C)/4=D
(9+3+20)/4=32/4=8


PUZZLE 65

Correct answer is 40

Column  A^2-B^2=C
C^2-B^2=D
So
4^2-3^2=16-9=7
7^2-3^2=49-9=40

The answers of the puzzles 60-61-62

Puzzle 60

Correct answer is 27
16  (1+6)X3=21
21 (2+1)X3=9
09 (0+9)X3=27

So 18 (1+8)X3=9X3=27


Puzzle 61

Correct answer is 256

12  (1+2)=3   3^2=9
9^2=81
81 (8+1)=9  9^2=81

So
169  (1+6+9)=16
16^2=256


Puzzle 62

Correct answers are 12   6

The puzzles solutions 57-58-59

Here you can find the solutions of puzzles 57-58-59

See the answers and the details in the puzzles  "Find the missing number"

Puzzle 57

Correct answer is 20

First row
42  4X2+(4+2)=14  
14  1X4+(1+4)=4+5=9

Second row
62  6x2+(6+2)=12+8=20
20  (2X0)+(2+0)=2

Third row
28  (2X8)+(2+8)=16+10=26
26  (2X6)+(2+6)=12+8=20

Puzzle 58

This puzzle has 2 correct answers

First solution
25+5=30
24+6=30
So  24+?=72  Therefore ?=72-24=48

Second solution
Highest common factor (25,30)=5

Highest common factor (24,30)=6
Highest common factor (24,72)=24


Puzzle 59

Correct answer is 36

First row LCM(4,16,8)=16
Second row LCM(9,18,6)=18
Third row LCM(24,6,8)=24
Fourth row LCM (12,3,9)=36

Answers and solutions-puzzles 54-55-56

See the answers and detailed solutions

 in these math puzzles that will help you

 improve your skills and

get better grades in competitive exams.

Puzzle 54

Correct answer =40

First row  8^2-6^2=64-36=28

Second row 5^2-2^2=25-4=21

Third row 7^2-3^2=49-9=40

Puzzle 55

Correct answer is 12

First row  least common multiple LCM (6,8)=24

Second row  least common multiple LCM (3,4)=12

Third row  least common multiple LCM(6,4)=12

Puzzle 56

Correct answer is 49

First row  4=2^2    16=4^2    (2+4)^2=36

Second row 9=3^2  25=5^2    (3+5)^2=64

Third row 16=4^2   9=3^2     (4+3)^2=49

Answers and solutions -Puzzles 51-52-53

See the answers and detailed solutions in these math puzzles that will help you improve your skills and get better grades in competitive exams.

puzzle 51

Correct answer 21

First row  51+30= 81    9^2=81
second row 24+40=64   8^2=64
third row 7^2=49  so 24 + ? =49  therefore 21 is the missing number.


puzzle 52

Correct answer  10

First row   28+8=36    6^2=36
second row  6+10=16   4^2=16
third row  75+25=100   ?^2=100    so the missing number is 10     10^2=100



puzzle 53

correct answer  27

First row  45    5^2-4^2=25-16=9
second row 48    8^2-4^2 =64-16 =48
third row  36       6^2-3^2 =36-9 =27