Quantitative Aptitude

Directions—(Q. 81–90) What should come in place of question mark (?) in the following questions ?
81. (8.2% of 365) – (1.75% of 108) = ?
(A) 16.02 (B) 28.04
(C) 42.34 (D) 53.76
(E) None of these
82. [(135)2 ÷ 15 ´ 32] ÷ ? = 45 ´ 24
(A) 18 (B) 24
(C) 36 (D) 44
(E) None of these
83. (96)2 + (63)2 = (?)2 – (111)2 – 8350
(A) 33856 (B) 30276
(C) 174 (D) 184
(E) None of these
84. 4368 + 2158 – 596 – ? = 3421 + 1262
(A) 1066 (B) 1174
(C) 1247 (D) 1387
(E) None of these
85. 2172 ÷ ? = 1832 – 956 – 514
(A) 6 (B) 8
(C) 10 (D) 12
(E) None of these
86. 666.06 + 66.60 + 0.66 + 6.06 + 6 + 60 = ?
(A) 819.56 (B) 805.38
(C) 826.44 (D) 798.62
(E) None of these
87. 15.594 – 4.312 – 3.517 – 1.689 = ?
(A) 6.706 (B) 6.760
(C) 6.670 (D) 6.607
(E) None of these
88. 205 ´ ? ´ 13 = 33625 + 25005
(A) 22 (B) 27
(C) 33 (D) 39
(E) None of these
89. 69 ÷ 3 ´ 0.85 + 14.5 – 3 = ?
(A) 36.45 (B) 23.85
(C) 42.95 (D) 18.65
(E) None of these
90. (10)24 ´ (10)– 21 = ?
(A) 3 (B) 10
(C) 100 (D) 1000
(E) None of these


ANS :


81. (B) ? = (8·2% of 365) – (1·75% of 108)
= 365 ´ – 108 ´
= 29·93 – 1·89 = 28.04 Ans.
82. (C) ? = [(135)2 ÷ 15 ´ 32] ÷ (24 ´ 45)
= ÷ (1080)
= = 36 Ans.
83. (D) ?2 = (96)2 + (63)2 + (111)2 + 8350
= 9216 + 3969 + 12321 + 8350
= 33856 = (184)2
? = 184 Ans.
84. (C) ? = 4368 + 2158 – 596 – 3421 – 1262
= 6526 – 5279 = 1247 Ans.
85. (A) 2172 ÷ ? = 1832 – 956 – 514
\ ? = =
= 6 Ans.
86. (B) ? = 666·06 + 66·60 + 0·66 + 6·06
+ 6 + 60
= 805·56 Ans.
87. (E) ? = 15·594 – 4·312 – 3·517 – 1·689
= 15·594 – 9·518 = 6·076 Ans.
88. (A) ? = =
= 22 Ans.
89. (E) ? = 69 ÷ 3 ´ 0·85 + 14·5 – 3
= 23 ´ 0·85 + 14·5 – 3
= 19·55 + 14·50 – 3 = 34·05 – 3
= 31·05 Ans.
90. (D) ? = (10)24 ´ (10)– 21
= (10)24 – 21 = (10)3
= 1000 Ans.