Solution: D	H	L	P	T
5	10	15	20	25
All the letters are multiples of 4. Hence a word starting with C will have the following subsequent letters.

C	F	I	L	0
3	6	9	12	15

Solution: spectacles are the wearables of the eyes whereas watch is the wearable of the wrist; not hand.

Solution: 1st term = 2 x 1 = 2

2nd term = (First term x 2) x 3, 3rd term = (Second term x 2) x 5

Concept here is that, double the last term and multiply it with next odd number

Therefore, Last term is (30240 x 2) x 11 = 665280

Solution: 
#	Answer	Correct answer	Your answer
1.	/, +, =	 	 
2.	+, /, =	 	 
3.	=, +, /	 	 
4.	+, =, /	Correct	 
One can solve these type of problems using trial and error method.

48 divided by 6 gives 8. 8 added to 9 gives 17

Solution: Here the given series is 128, 32, 14, 2.66, 0.88
 
128 / 4 = 32
32 / 3 = 10.666
10.666 / 4 = 2.666
2.666 / 3 = 0.888
 
Hence, the odd man in the given number series is 14.

Solution: The given number series is 90 72 56 42 36 20
9 x 10 = 90
8 x 9 = 72
7 x 8 = 56
6 x 7 = 42
5 x 6 = 30 (not 36) 
4 x 5 = 20
 
Hence, the odd man in the given number series is 36.

Solution: Given number sequence is 28, 16, 28, 76, 274
Here the sequence follows a pattern that
28
28 x 0.5 + 2 = 14 + 2 = 16
16 x 1.5 + 4 = 24 + 4 = 28
28 x 2.5 + 6 = 70 + 6 = 76
76 x 3.5 + 8 = 266 + 8 = 274
274 x 4.5 + 10 = 1233 + 10 = 1243
Hence, the next number in the given number sequence is 1243.

Solution: The given number series is 6, 6, 9, 18, 45, ?
Here the series follows a pattern that,
6 
6 x 1 = 6
6 x 1.5 = 9
9 x 2 = 18
18 x 2.5 = 45
45 x 3 = 135
Hence, the next number in the given number series is 135.

Solution: The given series is 12, 48, 168, 502, 1260
12
12 x 4 = 48
48 x 3.5 = 168
168 x 3 = 504
504 x 2.5 = 1260
 
Hence, the odd man out in the given series is 502.

Solution: Here the given series is 1, 3, 6, 11, 20, 37, ??,
and the logic behind the series is
1 x 2 + 1 = 3
3 x 2 + 0 = 6
6 x 2 + (-1) = 11
11 x 2 + (-2) = 20
20 x 2 + (-3) = 37
37 x 2 + (-4) = 70
Hence, the next number in the given series is 70.