Quantitative Aptitude Quiz

1. √2900 × √498 ÷ √251 = ? ÷ 8
(1) 600
(2) 670
(3) 770
(4) 750
(5) 730


2. 89.998% of 598.9 + 51.002% of 899.99 – 171.015 = ?

(1) 990
(2) 830
(3) 910
(4) 870
(5) 980

3. (341/20.002) ÷ (511/30.07) × (179.909/49.919) = ?

(1) 36
(2) 7.2
(3) 72
(4) 3.6
(5) 1.8

4. 8999 ÷ 90.005 × 95.998 = ? × 20.999

(1) 420
(2) 320
(3) 540
(4) 525
(5) 457

5. (39.99)² – (9.9)² – (15.1)² = ?

(1) 1375
(2) 1275
(3) 1100
(4) 1175
(5) 725

Directions (6 – 10): What will come in place of the question-mark (?) in the following questions?

6. (13/18) of  24% of 1023 = 120 + ?
(1) 60      
(2) 57
(3) 87
(4) 120   
(5) None of these

7. 5322– 8241 + 3642 + 3120 = ? + 1203
(1) 2640 
(2) 2569
(3) 1639 
(4)  2549
(5) None of these

8. 53 × 25 ÷  √625 – 32 =? – 42
(1) 132 
(2) 157
(3) 155 
(4) 133
(5)  None of these

9. √(58 × 10 + 120 + 29) = (?)²

(1) 27 
(2) √27   
(3) 272     
(4) 729   
(5) 725

10. 6² × 36² = 6^? × 216

(1) 4 
(2) 3    
(3) 6 
(4) 2
(5) None of these

Directions (11–15): What will come in the place of the question mark (?) in the following number series?

11. 13    16    14     17     15     18    (?)
(1) 16     
(2) 15       
(3) 14
(4) 21
(5) None of these

12. 25    50    35    70    55    110    95    (?)
(1) 196    
(2) 80
(3) 185 
(4) 190   
(5) None of these

13. 10     14     26    50    90     (?)
(1) 100    
(2) 125
(3) 150 
(4) 155  
(5) None of these

14. 2      8   20    44    92   (?)
(1)189    
(2)188   
(3) 288
(4) 818 
(5) None of these

15. 15      21     33     51    75    (?)
(1) 103 
(2) 102  
(3) 105  
(4) 95  
(5) None of these


ANSWERS
1. (1)
Explanations -

? =√2290×√498÷√251×8

≈ 54×22÷16×8

≈600

               

2. (2)
Explanations - 
? = 89.998% of 598.9+51.002% of 899.99 - 171.015

≈90% of 600 + 51% of 900 – 171.05

        ≈540+459 – 171

        ≈830

3. (4)
Explanations - 

? = (341/20.002) ÷ (511/30.07) * (179.909/49.919) = ?

     ≈ 340/20 * 30/510 * 180/50

     ≈ 3.6

4. (5)
Explanations - 

? = 8999÷90.005×95.998÷20.999

         ≈9000÷90×96÷21

         ≈9600÷21

         ≈457

5. (2)
Explanations - 

? = 39.99² – 9.9² – 14.9² 

≈ 40² – 10² – 15² 

≈ 1275

6. (2)
Explanations - 

? = (13/18) of 24% of 1203 – 120 

= (13/18)*(24/100)*1203-120 

= ((13*4*341)/100) – 120 

= 177.32 – 120 

= 57 (approx)

7. (5)
Explanations - 

? = 5322 – 8241 + 3642 +3120 – 1023 = 2820

? = 53 ^* 25 ÷ √625 – 3² + 4² 

= 125 * 25 ÷ 25 – 9 + 16 

= 125 + 7 

= 132

8. (1)
Explanations - 

(1) ? = 5³ * 25 ÷ √625 – 3² + 4² 

= 5³ * 25 ÷ 25 – 9+16 

= 125 + 7

= 132

9. (2)
Explanations - 
(?)² = √(58 * 10 + +29) 
√729 = 27 
? = √27

10. (2)
Explanations - 

6^? = (6² × 36²)/ 216

6^? = (6² × 6⁴)/6³    
6^? = 6³  
? = 3

11. (1)
Explanations - 
13,        16,        14,        17,        15,         18,         (16)

              +3           -2         +3         -2          +3          -2

12. (4)
Explanations - 

25,     50,    35,    70,    55,   110,  95,    (190)

      ×2     -15     ×2    -15    ×2       -15    ×2

13. (3)
Explanations - 
10,     14,      26,                    50,      90,        (150)

+4      +12     +24    +40      +60

     +8        +12    +16      +20

14. (2)
Explanations - 

2        8         20       44       92        (188)

    +6     +12     +24     +48      +96

15. (3)
Explanations - 

(3) 15      21       33      51       75        (105)

   +6       +12    +18    +24      +30