Sequence and Series - Online Test
Q1. Directions: What value should come at the place of question mark (?) in the given number series?
36, 205, 84, 165, 116, ?
Answer : Option C
Explaination / Solution:
36 205 84 165 116 (141)
+169 -121 +81 -49 +25
These all differences are squares of the numbers 13,11,9,7,5.
Q2. Directions: What value should come at the place of question mark (?) in the given number series?
35.6, 183, 736, 2211, 4424, ?
Answer : Option E
Explaination / Solution:
35.6 × 5 + 5 = 183
183 × 4 + 4 = 736
736× 3 × 3 = 2211
2211 × 2 + 2 = 4424
4424×1 + 1 = 4425
Q3. Directions: What value should come at the place of question mark (?) in the given number series?
346, 174, 89, 47.5, 27.75, ?
Answer : Option B
Explaination / Solution:
346÷ 2 + 1 = 174
174÷ 2 + 2 = 89
89÷ 2+3= 47.5
47.5÷ 3+4 = 27.75
27.75÷ 2 + 5 = 18.875
Q4. Directions: What value should come at the place of question mark (?) in the given number series?
46, 178, 270, 330, 366, 386, ?
Answer : Option A
Explaination / Solution:
46 178 270 330 366 386 398
132 92 60 36 20 12
-40 -32 -24 -16 -8
Q5. Direction: In the following number series, a wrong number is given. Find out that wrong number.
37, 54, 88, 142, 207, 292, 394
Answer : Option A
Explaination / Solution:
37 + 17 × 1 = 54
54 + 17 × 2 = 88
88 + 17 × 3 = 139
139+ 17 × 4 = 207
207 + 17 × 5 = 292
292+ 17 × 6 = 394
Q6. Directions: In the following number series, one of the numbers is wrong. Find out the wrong number.
64, 96, 288, 1296, 7776, 58420
Answer : Option E
Explaination / Solution:
64 × 1.5 = 96
96 × 3 = 288
288 × 4.5 = 1296
1296 × 6 = 7776
7776 × 7.5 = 58320
Q7. Directions: In the following number series, one of the numbers is wrong. Find out the wrong number.
7, 8, 16, 43, 109, 232, 448
Answer : Option B
Explaination / Solution:
7 + 13 = 8
8 + 23 = 16
16 + 33 = 43
43 + 43 = 107
107 + 53 = 232
232 + 63 = 448
Q8. Directions: What value should come at the place of question mark (?) in the following number series?
7, ?, 40, 73, 117
Answer : Option A
Explaination / Solution:
7+11=18
18+22=40
40+33=73
73+44=117
(Multiple of 11)
Q9. Direction: What value should come at the place of question mark (?) in the given number series?
14, 22, ?, 113, 238, 454
Answer : Option B
Explaination / Solution:
14+23=22
22+33=49
49+43=113
113+53=238
238+63=454
Q10. Directions: What value should come at the place of question mark (?) in the following number series?
16, 18, 24, 36, ?
Answer : Option C
Explaination / Solution:
16+(12+1)=18
18+(22+2)=24
24+(32+3)=36
36+(42+4)=56
