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Missing number series
Direction (1 – 3): What will come in place of question mark (?) in the following number series?
1) 19, 43, 91, 187, 379, 763, ?
A) 1531
B) 1743
C) 1471
D) 1961
E) None of these
2) 87, 183, ?, 314, 353, 377, 388
A) 242
B) 246
C) 258
D) 264
E) None of these
3) 587, 537, 468, ?, 289, 187, 82
A) 384
B) 376
C) 397
D) 368
E) None of these
Quadratic equation
Directions (4 – 6): In the following questions, two equations I and II are given. You have to solve both equations and give answer as,
a) If x > y
b) If x ≥ y
c) If x < y
d) If x ≤ y
e) If x = y or the relation cannot be established.
4)
I)Â x2-8x-345=0
II)Â y2+9y-322=0
5)
I)Â x2+23x+126=0
II)Â y2+26y+153=0
6)
I)Â x2+14x+45=0
II)Â y2+17y+72=0
Approximation
Direction (7-10): What is the approximate value should come in place of question mark in the following questions?
7)  89.90 * 6.06 + 56.05 % of 399.90 – √3720.898 * 4.09 + ? = 79.906 * 6.99
A) 50
B) 60
C) 40
D) 20
E) None of these
8) 23.90 % of 75.09 + 12.12 * 31.13 + 119.08 ÷ √289.098 = ?
A) 367
B) 377
C) 387
D) 397
E) None of these
9) 114.90 % of 19.908 + 189.90 * 5.99 – √1521.09 ÷ √8.909 = ?
A) 1120
B) 1130
C) 1150
D) 1170
E) None of these
10) 55.55 % of 654.90+18.18 % of 230.98 + 54.54 % of 198.087 = ? + 289.90
A) 180
B) 220
C) 260
D) 290
E) None of these
Answers :
Directions (1-3) :
1) Answer: A
19+(19+5)=43
43+(43+5)=91
91+(91+5)=187
187+(187+5)=379
379+(379+5)=763
763+(763+5)=1531
2) Answer: C
87+(16*6)=183
183+(15*5)=258
258+(14*4)=314
314+(13*3)=353
353+(12*2)=377
377+(11*1)=388
3) Answer: A
587-(25*2)=537
537-(23*3)=468
468-(21*4)=384
384-(19*5)=289
289-(17*6)=187
187-(15*7)=82
4) Answer: E
x2-8x-345=0
x2-23x+15x-345=0
x(x-23)+15(x-23)=0
(x-23)(x+15)=0
x=23, -15
y2+9y-322=0
y2+23y-14y-322=0
y(y+23)-14(y+23)=0
(y-14)(y+23)=0
y=14, -23
5) Answer: E
x2+23x+126=0
x2+9x+14x+126=0
x(x+9)+14(x+9)=0
(x+9)(x+14)=0
x=-9, -14
y2+26y+153=0
y2+9y+17y+153=0
y(y+9)+17(y+9)=0
(y+17)(y+9)=0
y=-9, -17
6) Answer: E
x2+14x+45=0
x2+9x+5x+45=0
x(x+9)+5(x+9)=0
(x+5)(x+9)=0
x=-5, -9
y2+17y+72=0
y2+8y+9y+72=0
y(y+8)+9(y+8)=0
(y+8)(y+9)=0
y=-8, -9
Directions (7-10) :
7) Answer: C
540+224-244+?=560
?=40
8) Answer: D
18+372+7=?
397=?
9) Answer: C
23+1140-13=?
1150=?
10) Answer: B
360+42+108=?+290
220=?
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