1. 0.15, 0.3, ____, 1.2, 2.4. What number should fill the blank?
a) 4.8
b) 0.006
c) 0.6
d) 0.9
Explanation: This is a simple multiplication series. Each number is 2 times greater than the previous number.
2. U32, V29, __, X23, Y20. What number should fill the blank?
a) W26
b) W17
c) Z17
d) Z26
Explanation: In this series, the letters progress by 1; the numbers decrease by 3.
3. Find the missing number: 3, 7, 15 ,?, 63 ,127
a) 30
b) 31
c) 47
d) 52
Explanation: Each number in the series is one more than twice the preceding number.
So, the missing term = (15 x 2) + 1 = 31
4. Find the missing term: 4 ,7, 12, 19, 28, ?
a) 30
b) 36
c) 39
d) 49
Explanation: The pattern is +3,+5,+7,+9,............
So, missing term=(28+11)=39
5. Find the missing term: 4, 10, ?, 82, 244, 730
a) 24
b) 28
c) 77
d) 218
Explanation: Each number in the series is 2 less than thrice the preceding number.
So, missing number = (10 x 3) - 2 = 28
6. Find the missing term: 120, 99, 80, 63, 48, ?
a) 35
b) 38
c) 39
d) 40
Explanation: The pattern is -21, -19, -17, -15, . . . . . . . .
So, missing term = 48 - 13 = 35
7. Find the missing term: 2, 3, 8, 27, 112, ?
a) 226
b) 339
c) 452
d) 565
Explanation: The pattern is ×1 + 1, × 2 + 2, × 3 + 3, × 4 + 4...........
So, the missing term = 112 × 5 + 5 = 565
8. Find the missing term: 22, 24, 28, ?, 52, 84
a) 36
b) 38
c) 42
d) 46
Explanation: The pattern is + 2, + 4, + 8, +16,............
So, the missing term = 28 + 8 = 36
9. Find the missing term: 1, 5, 14, 30, 55, 91,?
a) 130
b) 140
c) 150
d) 160
Explanation: The pattern is + 4, + 9, + 6, + 25, + 36,........i.e.,+ 22 ,+ 32 + 42 + 52 + 62 .........
So, the missing term = 91 + 72 = 91+ 49 = 140
10. Find the missing term: 4832, 5840, 6848, ?
a) 7815
b) 7846
c) 7856
d) 7887
Explanation: The pattern is + 1008.
So, the missing term = 6848 + 1008 = 7856.