Home
Exercise
1.
385, 462, 572, 396, 427, 671, 264
  • A.
    385
  • C.
    671
  • B.
    427
  • D.
    264
  • Answer & Explanation
  • Report
Answer : [B]
Explanation :
 
In each number except 427, the middle digit is the sum of the other two.
 
Report
Name Email  
2.
6, 13, 18, 25, 30, 37, 40
  • A.
    25
  • C.
    37
  • B.
    30
  • D.
    40
  • Answer & Explanation
  • Report
Answer & Explanation : [D]
Explanation :
 
The difference between two successive terms from the beginning are 7, 5, 7, 5, 7, 5.
 
So, 40 is wrong.
 
Report
Name Email  
3.
7, 26, 63, 124, 215, 342, (....)
  • A.
    481
  • C.
    391
  • B.
    511
  • D.
    421
  • Answer & Explanation
  • Report
Answer : [B]
Explanation :
 
Numbers are (23 – 1), (33 – 1), (43 – 1), (53 – 1), (63 – 1), (73 – 1) etc.
 
So, the next number is (83 – 1) = (512 – 1) = 511.
 
Report
Name Email  
4.
445, 221, 109, 46, 25, 11, 4
  • A.
    221
  • C.
    46
  • E.
    11
  • B.
    109
  • D.
    25
  • Answer & Explanation
  • Report
Answer : [C]
Explanation :
 
Go on subtracting 3 and dividing the result by 2 to obtain the next number.
 
Clearly, 46 is wrong.
 
Report
Name Email  
5.
1050, 510, 242, 106, 46, 16, 3
  • A.
    510
  • C.
    106
  • E.
    16
  • B.
    242
  • D.
    46
  • Answer & Explanation
  • Report
Answer : [C]
Explanation :
 
2nd term = (1st term - 30)   2 =
 
1050 - 30
2
   = 510;  
 
3rd term = (2nd term - 26)   2 =
 
510 - 26
2
   = 242;  
 
4th term = (3rd term - 22)   2 =
 
242 - 22
2
   = 110.  
 
 
  106 is wrong.  
 
Report
Name Email