Aptitude practice questions for sbi clerk 2018 part 1

1 )  22 , 10 , 8 , 12 , 40 , ?
Ans :


Note : Whenever you will find the second number is near of half of first number and third number is near of second number . Then , that series is based on  Half Pattern Series.


Whenever your series is Half pattern . as per the name it is required we have to multiply with 0.5

22 x 0.5 – 1 = 10

10 x 1 – 2  = 8

8 x 2 – 4 = 12

12 x 4 – 8 = 40

40 x 8 – 16 = 304

2 ) 8, 4.5, 5.5, 13, 56, ?

Ans :

Note : If you will find any decimal number in number series . Answer will be multiply by * 0.5 or 1.5

8 x 0.5 + 0.5 = 4.5

4.5 x 1 + 1 = 5.5

5.5 x 2 + 2 = 13

13 x 4 + 4 = 56

56 x 8 + 8 = 456

 
3) 8, 4, 4, 6, 12, .....?

Ans :

Note : If the same numbers are exist in the question. Maximum answer will follows the Divisible method.

4÷8 = 0.5

4÷4 = 1

6÷4 = 1.5

12÷6 = 2

x÷12 = 2.5

x = 12*2.5

x = 30

 

4 )

6, 3, 3, 6, 24, ?

Ans :

Note : If the same numbers are exist in the question. Maximum answer will follows the Divisible method.

 

6 ✕ 0.5 = 3

3 ✕ 1 = 3

3 ✕ 2 = 6

6 ✕ 4 = 24

24 ✕ 8 = 112

5)
Find the value of 3(1/5) +6(8/7)-4(6/5)

Ans:

        Write the above question as below                                      {x(a/b) = x+(a/b)}

                     3+6-4+(1/5)+(8/7)-(6/5)

                      5+(8/7)

                     we can write 6+(8/7) as 6(8/7)

6) Find the value of 50 % of 680 + 20 % of 70

Ans :
100 % of 680 is 680
50 % 0f 680 is 340
10 % of 70 is 7
20 % of 70 is =10%+10% = 20% i.e 14

50 % of 680 + 20 % of 70 = 340+14 = 354

7)If a man buys a TV for 3500 and he sold it for 25% profit. What is his selling Price ?


Ans:                  Here CP = 3500


                                  Profit % = 25 %

                                  SP = 125 % of 3500

                                  SP= (125*3500)/100

                                   SP= 4375.

8)If A's salary is 20% less than B's Salary, by how much percent is B 's salary more than A's?

Ans:                                 

                            

A is x% less than B , then B is more than A by    

                           

(x/(100-x)) *100 %

here x is 20 %

(20/80)*100 %

(1/4)*100 %

=25%

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