Number Series
Q1.
0, 3 , 8 , 15 , 24 , __________ .
(a) 35
(b) 17
(c) 30
(d) 45
Solution. a
square the natural number and then subtract by 1 .
12 - 1 = 0
22 - 1 = 3
62 - 1 = 35
Solution
Q2.
3, 9 , 18, 54 , 108 , __________ .
(a) 300
(b) 324
(c) 316
(d) 290
Solution. b
Multiply by 3 and 2 alternately .
108 x 3 = 324
Solution
Q3.
0, 4 , 18 , 48 , 100 , _______ .
(a) 180
(b) 160
(c) 170
(d) 190
Solution. a
In this apply rule a3 - a2 (where a first natural numbers)
a = 6 , 63 - 62 =
216 - 36 = 180
Solution
Q4.
30, 37, 44 , 51 , 58, ________________ .
(a) 62
(b) 63
(c) 65
(d) 64
Solution. c
In this add 7 in all previous terms
So, 58 + 7 = 65
Solution
Q5.
16, 18 , 21 , 25 , 30 , _______ .
(a) 30
(b) 36
(c) 40
(d) 46
Solution.
In this add 2, 3, 4, 5 & 6
30 + 6 = 36
Solution
