Sequence and Series Questions and Answers Part-6

1. The letters skipped between adjacent letters is in the order of 1, 2, 3, 4, ..... Which alternative follows this rule ?

Answer: c
Explanation: EGJNS follows the skipping of 1, 2, 3 & 4 letters respectively as we can see in: EFGHIJKLMNOPQRS

2. Which of the following will come in place of the question mark (?) in the following sequence?
16D7, 18G10, 21KI4, 25P19, ?
a) 30V20
b) 30V25
c) 30V24
d) 29V25

Answer: b
Explanation: Hence, option (c) is the correct answer. There are three series in the sequence. The numbers to the left of the letter— 16, 18, 21, 25 are increasing continuously by 1 more than the previous increase, i.e., the series of increases in these numbers are + 2, +3, +4 and the next number should be +5; thus 25 +5=30.
The letters DGKP form a series where 2, 3 and 4 letters are skipped every time. Hence, thenext letter would be V. Similarly, 7, 10, 14, 19 would give 25 as the next term. Thus, the correct answer would be 30V25 option (b).

3. BZ, HT, NN, ?, ZB
a) LF
b) SX
c) TH
d) TI

Answer: c
Explanation: For the first alphabet add 6 to the position number to get the next first alphabet of the next element of the series and for the second alphabet subtract 6 from the position and we’ll get the required number. Option (c) is correct.

4. J2Z, K4X, I7V, ?, HI6R, F22P
a) G11T
b) G11S
c) L12S
d) G11U

Answer: a
Explanation: For the first alphabet we jump from one alphabet to the next alphabet and then to the alphabet right before the first jump. The numbers move with a gap of 2,3,4… .For the last alphabet count from Z leaving one alphabet in the count. G11T would be correct. Option (a) is correct

5. ane ____ ba ______ ebb ______ neb _____an _______ bb
a) e b b a b
b) b B a b e
c) B b a b e
d) b n a b e

Answer: d
Explanation: It is a repetition of the string: anebb. The missing alphabets in the blanks are: bnabe. Option(d) is correct.

6. In a row of children, Bali is seventh from the left and Moti is fourth from the right. When Bali and Moti exchange positions, Bali will be fifteenth from the left. What will be Moti’s position from the right?
a) Eighth
b) Fourth
c) Eleventh
d) none of these

Answer: d
Explanation: Since, Bali’s count from the left goes up by 8, Moti’s count from the right would go down by 8 too. Option (d) is correct

7. Which of the following cannot be a number of the series ….64, 125, 216, 343, 512 …..?
a) 8
b) 729
c) 27
d) 999

Answer: d
Explanation: All the numbers in the series are perfect cubes. 999 is not a cube of any natural number. Hence, Option (d) does not belong to the series.

8. Complete the series
E-5, G-7, I-9, K-11, ?
a) L-13, N-14
b) M-13, O-15
c) L-12, M-14
d) K-12, M-14

Answer: b
Explanation: M13 & O15 should be the correct terms. Option (b) is correct

9. An application was received by class teacher in the afternoon of a week day. Next day she forwarded it to the Student Coordinator, who was on leave that day. The Student Coordinator put up the application to the principal next day in the evening. The Principal studied the application and disposed off the matter on the same day, i.e, Saturday. Which day was the application received by the inward clerk?
a) Monday
b) Wednesday
c) Tuesday
d) Thursday

Answer: d
Explanation: A gap of two days is there in receiving and the disposal of the application. Thursday would be the correct answer option (d).

10. Which letter should be the tenth letter to the left of the ninth letter from the right, if the first half of the alphabet of English are reversed ?
a) D
b) F
c) E
d) I

Answer: b
Explanation: We are looking for the 19th letter from the right in the series:
The letter would be F as can be counted from the above series. Option (b) is correct.