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Basic Number Theory for Problems on numbers in Aptitude

         Hi everyone, you may not get direct questions on this in any aptitude type test. But, by knowing this number system basics you can be able to solve some silly questions on numbers in some simple tests. So, Get your basics brushed up with this.

0,1,2,3,4,5,6,7,8,9      -    Digits
group of digits             -    Numbers


basic number theory for problems on numbers in aptitude - puzzles9


PUZZLE 51

FIND THE MISSING NUMBER IN THE BELOW NUMBER SEQUENCE APTITUDE PUZZLE

PUZZLES9 - PUZZZLE 51 - FIND MISSING NUMBER IN NUMBER SEQUENCE PUZZLE


                                                                     
ANSWER : 8

SOLUTION : 

In the above puzzle, sum of corner numbers and sum of middle numbers is equal to 34.
10 + 9 + 8 + 7 = 34 ;
15 + 5 + 6 + 8 = 34 ;

So, answer is 8.



PUZZLE 50

Find the missing number in the below number sequence puzzle

puzzles9 - puzzle 50 - find the missing number in number sequence puzzle

                                                                   


Answer : 9

Solution : 

In the above puzzle, in each row, subtract the second number from first number to get the third number and add the first two numbers to get the fourth number.

5 - 2 = 3 ; 5 + 2 = 7 ;
6 - 3 = 3 ; 6 + 3 = 9 ;
4 - 1 = 3 ; 4 + 1 = 5 ;
8 - 1 = 7 ; 8 + 1 = 9 ;

So, answer is 9.


PUZZLE 49

Find out the odd letter from the following set of letters

PUZZLE 49 - puzzles9 - find the odd letter out from the set of letters in the logical puzzle

                                                                

   Answer :      L

Solution  :

                   Except L all the other letters are formed by three lines. L is formed with only two letters. So, L is the odd one among the letters.

So, answer is L.