UPSC NDA General Ability Solved Question Papers

NDA National Defence Academy Examination General Intelligence Part A April 2011 Original Question Paper with answers and detailed explanations

1.  Complete the series :

11,  12,  17,  18,  23,  24  ...  

(1) 30

(2) 35

(3) 12

(4) 14

(5) None of these

Ans :  (5)

Explanation :   Alternate numbers increase by 6.

 

2.  Complete the series :

1,  8,  27,  64,  125,  216 .....

(1) 343

(2) 512

(3) 729

(4) 1000

(5) None of these

Ans :  (1)

Explanation :   The series is

1³, 2³, 3³, 4³Â .......

Hence missing figure :  7³Â = 343

 3.  Suppose you are in charge of a Military Command guarding a bridge and you receive a message from the bridge that the enemy forces have almost reached the other side of the bridge. What telephone message would you send ?

(1) Order air-shelling

(2) Break the bridge

(3) Send more troops

(4) Surrender to them

(5) None of these

Ans :  (2)

 4.  Supply the missing figure :

3,  11,  8,  16,  13  ....  18

(1) 15

(2) 17

(3) 14

(4) 21

(5) None of these

Ans :  (4)

Explanation :   In the series take alternate terms and see, it is increasing by 5.

Thus missing figure is 16 + 5 = 21

11,  16,  (16 + 5),  ..... 

5.  Usha is twice as old as Rita.  Three years ago she was three times as old as Rita.  How old is Usha now ?

(1) 7 years

(2) 9 years

(3) 6 years

(4) 12 years

(5) None of these

Ans :  (4)

Explanation :   Now U = 2R  (U - Usha's age  R - Rita's age)

Three years ago,

(U - 3) = 3(R - 3)

∴    (2R - 3) = 3(R - 3)          (∴ U = 2R)