Scroll:Mental Sums >> Mental Sums >> mcq (1183)


Written Instructions:

For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..

For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.

Leave your answers in the simplest form or correct to two decimal places.



 

1)  

Find the value of 79 - 13






(                    )




2)  

Find the value of 89 - 13







(                    )




3)  

Find the value of 712 - 14






(                    )




4)  

Find the value of 34 - 12






(                    )




5)  

Find the value of 67 - 27






(                    )




6)  

Find the value of 12 - 38






(                    )




7)  

Find the value of 35 - 110






(                    )




8)  

Find the value of 57 - 37






(                    )




9)  

Find the value of 712 - 13






(                    )




10)  

Find the value of 12 - 512






(                    )




 

1)  

Find the value of 79 - 13





Answer: 3


SOLUTION 1 :

79 - 1x33x3 = 79 - 39
             = 49



2)  

Find the value of 89 - 13






Answer: 2


SOLUTION 1 :

89 - 1x33x3 = 89 - 39
             = 59



3)  

Find the value of 712 - 14





Answer: 1


SOLUTION 1 :

712 - 1x34x3 = 712 - 312
               = 412

               = 13



4)  

Find the value of 34 - 12





Answer: 3


SOLUTION 1 :

34 - 1x22x2 = 34 - 24

             = 14



5)  

Find the value of 67 - 27





Answer: 3


SOLUTION 1 :

67 - 27 = 47



6)  

Find the value of 12 - 38





Answer: 1


SOLUTION 1 :

1x42x4 - 38 = 48 - 38

             =18

 



7)  

Find the value of 35 - 110





Answer: 1


SOLUTION 1 :

3x25x2 - 110 =610 - 110

               = 510

                = 12



8)  

Find the value of 57 - 37





Answer: 4


SOLUTION 1 :

57 - 37 = 27



9)  

Find the value of 712 - 13





Answer: 2


SOLUTION 1 :

712 - 1x43x4 = 712 - 412

               = 312

               = 14



10)  

Find the value of 12 - 512





Answer: 1


SOLUTION 1 :

1x62x6 - 512612 - 512
               = 112