
Directions: In each of the following questions, a number series is given with one term missing. Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.
Q1. 1, 9, 25, 49, ?, 121
(a) 64
(b) 81
(c) 91
(d) 100
Q2. 4, 7, 12, 19, 28, ?
(a) 30
(b) 36
(c) 39
(d) 49
Q3. 11, 13, 17, 19, 23, 25, ?
(a) 26
(b) 27
(c) 29
(d) 37
Q4. 6, 12, 21, ?, 48
(a) 33
(b) 38
(c) 40
(d) 45
Q5. 2, 5, 9, ?, 20, 27
(a) 14
(b) 16
(c) 18
(d) 24
Q6. 6, 11, 21, 36, 56, ?
(a) 42
(b) 51
(c) 81
(d) 91
Q7. 10, 18, 28, 40, 54, 70, ?
(a) 85
(b) 86
(c) 87
(d) 88
Q8. 120, 99, 80, 63, 48, ?
(a) 35
(b) 38
(c) 39
(d) 40
Q9. 22, 24, 28, ?, 52, 84
(a) 36
(b) 38
(c) 42
(d) 46
Q10. 4832, 5840, 6848, ?
(a) 7815
(b) 7846
(c) 7856
(d) 7887
Solutions
S1. Ans.(b)
Sol. The given series consists of squares of consecutive odd numbers i.e. 1², 3², 5², 7², ……..
So, missing term = 9² = 81.
S2. Ans.(c)
Sol. The pattern is +3, +5, +7, +9, ……
So, missing term = 28 + 11 = 39.
S3. Ans.(c)
Sol. The pattern is +2, +4, +2, +4, ……
So, missing term = 25 + 4 = 29.
S4. Ans.(a)
Sol. The pattern is +6, +9, +12, +15, ……
So, missing term = 21 + 12 = 33.
S5. Ans.(a)
Sol. The pattern is +3, +4, +5, +6, ……
So, missing term = 9 + 5 = 14.
S6. Ans.(c)
Sol. The pattern is +5, +10, +15, +20, ……
So, missing term = 56 + 25 = 81.
S7. Ans.(d)
Sol. The pattern is +8, +10, +12, +14, ……
So, missing term = 70 + 18 = 88.
S8. Ans.(a)
Sol. The pattern is –21, –19, –17, –15, ……
So, missing term = 48 – 13 = 35.
S9. Ans.(a)
Sol. The pattern is +2, +4, +8, +16, ……
So, missing term = 28 + 8 = 36
S10. Ans.(c)
Sol. The pattern is +1008,+1008,………
So, missing term = 6848 + 1008 = 7856.