76. The next term in the series ABD, DGK, HMS, MTB, ……… is:
(A) NSA
(B) SBL
(C) PSK
(D) RUH
Answer:
(B) SBL
Explanation:
Checking the first letters: A(+3)=D, D(+4)=H, H(+5)=M, M(+6)=S. The second letters: B(+5)=G, G(+6)=M, M(+7)=T, T(+8)=B. The resulting next triplet starts with SB, matching SBL.
77. Ajay is a friend of Rakesh. Pointing to an old man Ajay asked Rakesh who is he? Rakesh said “His son is my son’s uncle”. The old man is related to Rakesh as :
(A) Grandfather
(B) Father-in-law
(C) Father
(D) Uncle
Answer:
(C) Father
Explanation:
“My son’s uncle” means Rakesh’s brother. If the old man’s son is Rakesh’s brother, then the old man is the father of Rakesh.
78. A group of students appeared in some test. He mean of 1/3rd students is found to be 60. The mean of remaining students is 78. The mean of the whole group will be
(A) 80
(B) 76
(C) 74
(D) 72
Answer:
(D) 72
Explanation:
Let total students be 3. The sum of 1/3rd (1 student) = 60. The sum of remaining (2 students) = 2 * 78 = 156. Total sum = 60 + 156 = 216. Mean = 216 / 3 = 72.
79. One writes all numbers from 50 to 99 without the digits 2 and 7. How many numbers have been written?
(A) 32
(B) 36
(C) 40
(D) 38
Answer:
(A) 32
Explanation:
There are 50 numbers in total. The 70s decade (10 numbers) is entirely excluded. In the remaining 40 numbers (50s, 60s, 80s, 90s), any number ending in 2 or 7 is excluded (2 numbers per decade = 8 numbers). 50 – 10 – 8 = 32 numbers.
80. Complete the series BB, FE, II, ML, PP, ………..by choosing one of the following option given :
(A) TS
(B) ST
(C) RS
(D) SR
Answer:
(A) TS
Explanation:
Looking at the first letter of each pair: B(+4)F, F(+3)I, I(+4)M, M(+3)P. The next should be P(+4)=T. Looking at the second: B(+3)E, E(+4)I, I(+3)L, L(+4)P. The next should be P(+3)=S. Thus, TS.
