Number Series
Q1.
1, 2, 6, 12, 36 _________ .
(a) 72
(b) 70
(c) 108
(d) 100
Solution. a
multiply by 2 and 3 alternately .
Solution
Q2.
7 , 9 , 13 , 19 , 27 , __________ .
(a) 37
(b) 35
(c) 30
(d) 40
Solution. a
add 2, 4, 6, 8 & 10 in the previous number .
Solution
Q3.
15, 16 , 34, 105 , 424 ____ .
(a) 2120
(b) 2125
(c) 1800
(d) 2126
Solution. b
Pattern 15 x 1 + 1 = 16 , 34 x 3 + 3 = 105
16 x 2 x 2 = 34 , 105 x 4 + 4 = 424
424 x 5 + 5 = 2125 .
Solution
Q4.
824 , 408 , 200 , 96 , 44 _______ .
(a) 36
(b) 18
(c) 40
(d) 15
Solution. b
pattern : (previous term - 8) ÷ 2 = 36 ÷ 2 = 18
Solution
Q5.
2 , 6 , 14 , 30 , 62 _______ .
(a) 126
(b) 120
(c) 110
(d) 100
Solution. a
pattern : (multiply by 2) + 2
= 62 x 2 + 2
= 124 + 2
= 126
Solution
