Choose the Correct Alternative Number and Complete the Series
A. 4, 8, 28, 80, 244, ?
- 252
- 428
- 628
- 728
B. 165, 195, 255, 285, 345, ?
- 375
- 390
- 420
- 405
C. 4, 10, ?, 82, 244, 730
- 24
- 28
- 77
- 56
D. 10000, 11000, 9900, 10890, 9801, ?
- 10261
- 10425
- 10781
- 10771
(A) Answer: (4) 728.
Explanation:-
31 = 3+ 1 = 4
32 = 9 – 1 = 8
33 = 27 + 1 = 28
34 = 81 – 1 = 80
35 = 243 + 1 = 244
36 = 729 – 1 = 728
Hence, the answer is 728.
(B) Answer: (1) 375.
Explanation:-
165 + 30 = 195
195 + 60 = 255
255 + 30 = 285
285 + 60 = 345
345 + 30 = 375
Hence, the answer is (1) 375.
(C) Answer: (2) 28
Explanation:-
31 + 1 = 4
32 +1 = 10
33 + 1 = 28
34 + 1 = 82
35 + 1 = 244
36 + 1 = 730
Hence, the answer is (2) 28.
(D) Answer: (3) 10781
Explanation:-
We add and subtract 10% in the term
Thus, 10000+ (10% of 10000)
= 10000 + 1000 = 11000;
= 11000-(10% of 11000)
= 11000 – 1100 = 9900:
9900+ (10% of 9900)
= 9900 + 990 = 10890;
10890 – (10% of 10890)
= 10890 – 1089 = 9801;
So, missing term=9801+ (10% of 9801) = 9801+980=10781.
Hence, the answer is (3) 10781.
