TRICKY MATHS RIDDLES WITH ANSWERS 

This blog explains about TRICKY MATHS RIDDLES WITH ANSWERS . It is explained clearly well below :

 

 1. If 6 + 4 = 210

        9 + 2 = 711

        ? + ? = 113

Then what is the number ?

ANSWER :

It traces the pattern that ( a – b ) followed by (a + b )

                                        ( 6 – 4 )( 6 + 4 ) = 210

                                        ( 9 – 2 ) ( 9 + 2 ) = 711

                                So   ( 7 – 6 ) ( 7 + 6 ) = 113

 

2 . What will be the next number in the given sequence ?

         0  1   3  2  6  3  9  4  12   5   ?

ANSWER :

Let us consider the numbers to be  “ abcdefghijkl”

Here the numbers  “ a , c , e , g , i , k ” are consecutive numbers and the numbers “ b , d , f , h , j , l ” are multiples of 3 .

So the next number will be 15 

3.  If   1  +  4 =  5

          2  +  5  = 12

           3  +  6 = 21

Then 8 + 11 = ?

ANSWER :

It is of the form ( X * Y ) + X

                          ( 1  * 4 ) + 1 = 5

                          (  2 * 5 ) + 2 = 12

                         ( 3 * 6  ) + 3  = 21

            So ,       ( 8 * 11 ) + 8 =  96

 

4 . What will be the next number in the sequence ?

   70 68 64 58 50 ?

ANSWER :

It follows the pattern that the difference between the consecutive numbers are multiples of 2

  70 – 68 = 2 ,

  68 – 64 = 4 ,

   64 – 58 = 6 ,

    58 – 50 = 8 ,

      50 – x = 10

    So x = 40

 5. If  1 1 1 1 = R

        2 2 2 2 = T

        3 3 3 3 =  E

Then 4 4 4 4 = ?

ANSWER :

The sum of 1 1 1 1 = 4 (FOUR ) = R

                2 2 2 2 = 8 ( EIGHT ) = T

           3 3 3 3 = 12 ( TWELVE ) = E

            4 4 4 4 = 16 (SIXTEEN ) = N

6. If 2 x – 4 / y = 10

         2 x + 2 / y = 4

Then what will be the value of x and y ?

   Solution :

   Multiplying by  y we get ,

 2 x y – 4 = 10 y

 2 x y + 2 =  4 y

     ( – 6  ) = 6 y

  • Y = -1

Then 2 x(- 1) – 4 = 10(-1)

                 ( – 2 x ) =   4 – 10   

                      – 2 x = – 6

                           X = 3

Thus the values of x and y are 3 and -1

 

 7 . Using only addition how will add eight 8 ‘s and you get 1000 ?

ANSWER :

                        888

                           88

                              8

                              8

            ( + )          8

                __________

                           1000 

8 . It is a 9 letter word 123456789

A ) If you lose it you will die

B ) If you have 234 then you can 1234

C ) 56 is a disease

D ) 89 indicates the exact time and location

E ) 5 and 9 are the same alphabets , 2 and 7 are same and 3 and 8 are the same alphabets .

ANSWER : A ) HEARTBEAT

                    B) EAR => HEAR

                    C) TB

                    D) AT

                    E )  5 = 9 = T  ,  2 = 7 = E  and  3 = 8 = A

9 . It is a 6 letter word

A ) First three letters is the largest thing in the world

B ) 234 indicates an human organ

C ) 345 indicates a part of a circle

D ) The whole word plays  the vital key role in the internet today   

ANSWER :  A ) SEA

                      B ) EAR

                      C ) ARC

                      D ) SEARCH

10 . If  2651 = 86 

             3342 = 66

              9017 = 98

   then   6113 = ?

ANSWER :

It is of the form (a + b ) followed by ( c + d ) 

            ( 2 + 6 ) ( 5 + 1 ) = 86 

             ( 3 + 3) ( 4 + 2 ) = 66

             ( 9 + 0 ) ( 1 + 7 ) = 98

   then  ( 6 + 1 ) ( 1 + 3 ) =  74