Ans 120 directions 7 to 8 find the wrong terms ex 7 1

Ans. 120
Directions : (7 to 8) Find the wrong term(s) -
Ex 7. 1, 3, 8, 19, 42, 88, 184
Sol.
Hence, number 88 is wrong and should be replaced by 89.
or 1 × 2 + 1, 3 × 2 +2, 8 × 2 + 3, 19 × 2 + 4, 42 × 2 + 5, 89 × + 6
Ans. 88
Ex 8. 105, 85, 60, 30, 0, - 45, - 90
Sol. 105 - 20 = 85
85 - 25 = 60
60 - 30 = 30
30 - 35 = -5
- 5 - 40 = -45
- 45 - 45 = -90
Hence, number 0 is wrong and should be replaced by -5.
Ans. 0
Direction : (9 to 10) In each of following questions, a number series is given. After the series, below it in the
next line, a number is given followed by (P), (Q), (R) (S) and (T). You have to complete the series
starting with the number given following the sequence of the given series. Then answer the
question given below it.
Ex 9. 12 28 64 140
37 (P) (Q) (R) (S) (R)
Which number will come in place of (T) ?
Sol.
12
28 64 140
x3 2 +4
x3 2 +8
x3 2 +12

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Similarly (P) (Q) (R) (S) (T)
Therefore, the number 1412 will come in place of (E).
Ans. 1412
Ex 10. 2 9 57 337
3 (P) (Q) (R) (S) (T)
Which number will come in place of (Q) ?
Sol.
Similarly, (P) (Q) (R) (S)
Therefore, the number 113 will come in place of (Q).
Ans. 113
ALPHABET SERIES (SERIES OF LETTERS):
(a) Pattern of Alphabets Show Variation Based on :
(i) Position of the letters
(ii) Difference between the alphabets
(i) Position of alphabets:
Alphabets in order :
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
Alphabets in reverse order :
Z Y X W V U T S R Q P O N M L K J I H G F E D C B A
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
Direction : (11 to 18) Find the missing term(s) :
Ex 11. B, E, H, ?
37
78 164 340 696 1412 1412 1412 1412
x3 2 +4 x3 2 +8
x3 2 +12
x3 2 +16
x3 2 +20
9 57 337
x3 8-7
x3 7-6 x3 6-5
2
17 113 673
x3 8-7
x3 7-6 x3 6-5
3 3361
x3 5-4

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Sol. In the given series, every letter is moved three steps forward to obtain the corresponding letters of the next
term. So, the missing term is K.
Ex.12 Q, N, K, ?, E
Sol/ In the given series, every letter is moved three steps backward to obtain the corresponding letters of the
next term. So, the missing term is H.
Ex. 13 CG, DI, ?, IP, MU
Sol. The first letter of the first, second, their ...... terms are moved one, two three, four, five, ..... steps forward
respectively and the second letters are moved two, three four, five, ...... steps forward respectively. So the
missing term would be FL.
Ex.14. AB, BA, ABD, DBA, PQRS, ?
Sol. The first term is reversed to get second term. The third term is reversed to get the fourth term. Similarly , to
get the sixth tem, we reverse the fifth term. So, the missing term would be SRQP.
Ex.15. 1725, 15X4, 13V3, ?, 9R1
Sol. The first number & second letter of every term is moves steps backward & the third number of every term is
moved one step backward. So, the missing term would be 11T2.