PUZZLE 20

FIND THE MISSING NUMBER IN THE FOLLOWING NUMBER SEQUENCE PUZZLE

Answer  :  8

solution  :  

               In the above puzzle, logic is that the average of first two digit number and last two digit number gives middle two digit number in each row.

(16+24)/2 =  20 :

(39+35)/2 =  37 ;

(79+11)/2 =  45 :

(56+46)/2 =  51 ;

(38+88)/2 =  63 ;

So, answer is 8.

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PUZZLE-19

FIND THE MISSING NUMBER IN THE BELOW NUMBER SEQUENCE PUZZLE

Answer   :  4

Solution  :

  

              In the above puzzle, in each row double the numbers and add them to get final box value in that row.

First row       :    6+10+12  = 28 ;

Second row  :     8+4+14    = 26 ;

Third row     :     16+4+12  = 32 ;

Fourth row   :     18+8+2    = 28 ;

So, the answer is 4.

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PUZZLE-18

Find the missing letter in the following puzzle

Answer  :   K                   

Solution :   
          
1 - 26 numbers are assigned to A - Z in alphabetical order.
So,
B = 2
C = 3
E = 5
G = 7
From above, letters are following prime number sequence.
Next number = 11 i.e. K
So, answer is K.

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PUZZLE-17

FIND THE MISSING LETTER IN THE BELOW NUMBER SEQUENCE PUZZLE

ANSWER     :   S

SOLUTION  :
                1 to 26 numbers are assigned to alphabets from A to Z in the respective manner. 
So, 
P = 16
T = 20
L = 12
S = 19
Now from above picture, 
16*20 =320
12*19=228.
So, answer is 19 i.e. S

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PUZZLE-16

FIND OUT THE LAST DIGIT IN THE FOLLOWING MATHEMATICAL OPERATION

ANSWER : 1
SOLUTION :

        Procedure to be followed to find last digit for a number like (xyz)ⁿ

First divide power n with 4.

If 0 is remainder,

                  If z=even; last digit=6;

                  If z=odd(except 5); last digit =1;

                  If z=5; for all n values last digit=5;

If 1 is remainder then last digit is z¹ ;

If 2 is remainder then last digit is z² ;

If 3 is remainder then last digit is z³ ;

In above problem 1999/4 gives remainder 3,

so last digit in first number is 7³

last digit in second number is 1³

last digit in last number is 7³

so answer =  7³ + 1³ -7³ = 1 

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PUZZLE-15

FIND THE NUMBER IN THE BELOW NUMBER SEQUENCE PUZZLE

ANSWER : 1
SOLUTION :
In the given number sequence puzzle
1st row  = 17*17   =  289
2nd row = 18*18   =  324
3rd row  =  19*19  =  361

PUZZLE-14

FIND THE NUMBER IN THE FOLLOWING NUMBER SEQUENCE PUZZLE

ANSWER     :    8
SOLUTION   :
                        In the above table middle number of each row is equal to half of the sum of the other numbers in the respective row.
So, sum of other numbers of middle row is
      6+1+2+3+3+1=16
half of 16 is 8.