Number Series Quiz
Q16. 0, 4, 18, 48, ?,
180
(A) 58
(B) 68
(C) 84
(D) 100
Answer: (D) 100
0X1²=0, 1X2²=4, 2X3²=18, 3X4²=48, 4X5²=100,....
Q17. 7, 9, 13, 21, 37, ?
(A) 58
(B) 63
(C) 69
(D) 72
Answer: (C) 69
Its addition of 2, 4, 8, 16, 32 series to the numbers
Q18. 3, 4, 7, 11, 18, 29, ?
(A) 31
(B) 39
(C) 43
(D) 47
Answer: (D) 47
Its addition of 1, 3, 4 (3+1), 7(4+3), 11(7+4), 18(11+7)...
Q19. 9, 8, 10, 16, 11, ?,
12, 64
(A) 28
(B) 36
(C) 25
(D) 32
Answer: (D) 32
First digit is added 1 to get alternate numbers, second digit is multipled by 2 alternately
Q20. 14, 19, 29, 49, 89, ?
(A) 139
(B) 149
(C) 159
(D) 169
Answer: (D) 169
Its addition of 5, 10, 20, 40, 80
Q21. 121, 144, 289, 324, 529, 576,
?
(A) 961
(B) 841
(C) 900
(D) 729
Answer: (B) 841
Its squares of 11,12,17,18,23,24,29...with the gap of after the gap of 6
Q22. 17, 43, 81, 131,
?
(A) 300
(B) 193
(C) 375
(D) 468
Answer: (B) 193
43-17 =26, 81-43=38, 131-81=50,...so the series
Q23. 5, 11, 23, 47, 95,
?
(A) 161
(B) 169
(C) 190
(D) 191
Answer: (D) 191
Addition in the series of 6, 12, 24, 48, 96....
Q24. 31, 29, 24, 22, 17, ?
(A) 15
(B) 14
(C) 13
(D) 12
Answer: (A) 15
Addition of 2 and 5 alternately....
Q25. 0, 4, 8, 24, 64, 176, ?
(A) 180
(B) 480
(C) 280
(D) 300
Answer: (B) 480
8=2(0+4), 24=2(4+8), 64=2(8+24), 176=2(64+24)...so 2(176+64)=480
Q26. 3120, ?, 122,
23, 4
(A) 488
(B) 621
(C) 610
(D) 732
Answer: (B) 621
4X5=20+3=23 23X5=115+7=122 122X5=610+11=621 621X5=3105+15=3120
Q27. 18, 10, 6, 4, 3, ?
(A) 8
(B) 4
(C) 3.5
(D) 2.5
Answer: (D) 2.5
Its a sequence of -8, -4, -2, -1, -1/2 from its previous number
Q28. 2, 5, 10, 17, 26, ?
(A) 36
(B) 49
(C) 37
(D) 47
Answer: (C) 37
Addition in the series of 3, 5, 7, 9, 11 series
Q29. 9 : 80 :: 100 : ?
(A) 901
(B) 1009
(C) 9889
(D) 9999
Answer: (D) 9999
9X9=81-1=80; 100X100=10000-1=9999
Q30. 25 : 125 :: 36 : ?
(A) 180
(B) 206
(C) 216
(D) 318
Answer: (A) 180
25X5=125; 36X5=180
Practice Test Exam