Amazon Aptitude Questions - Interview Preparation MCQ

5/6 tank = 20 Min
Full tank = 24 Min
1/2x+ 1/3x = 1/24
x = 20, A= 2x = 40 Min

Average speed = (3*20*40*60)/800+2400+1200 = 360/11

Efficiency (P: Q) = 5: 4
Number of days(P: Q) = 4x : 5x = 4x : 25
Therefore, Number of days required by P to finish the work alone = 4x
= 4 x 5 = 20.
P and Q work together for last 5 days = 5 x 9 = 45%
Efficiency of P = 5% and Q’s efficiency = 4%
Therefore, No. of days taken by P to complete 55% work = 55/5 = 11 days

Amount after 1 yr = 4000[1 + 8/100] = 4320
Paid 500, so P = 4320 – 500 = 3820
Amount after 2nd yr = 3820[1 + 8/100] = 4125.6
So P= 4125.6-500 = 3625.6
Amount after 3rd yr = 3625.6[1 + 8/100] = 3915.6

30,000: N = 2:3
N = 90,000/2 = 45,000

Let the side of the square be a cm.
Parameter of the rectangle = 2(16 + 14) = 60 cm
Parameter of the square = 60 cm
i.e. 4a = 60
a = 15
Diameter of the semicircle = 15 cm
Circimference of the semicircle
= 1/2(π)(15)
= 1/2(22/7)(15) = 330/14 = 23.57 cm to two decimal places

Along one edge, the number of small cubes that can be cut
= 100/10 = 10
Along each edge, 10 cubes can be cut.
Total number of small cubes that can be cut = 10 * 10 * 10 = 1000

FLOOD => 6 3(1+2) 6(1+5) 6 4 = 63664
WATER => 5(2+3) 1 2(2+0) 5 9(1+8) = 51259

L(+1)O(-1) N(+2)D(-2) O(+3)N(-3)
MN PB RK
Hence, M(+1)O(-1) S(+2)C(-2) O(+3)W(-3)
NN UA RT

If Subbu is seventeenth from the right and eighteenth from the left, the total number of people currently in the line is:
17 + 18 - 1 = 34
To make the total number of people in the line 40, we need to add:
40 - 34 = 6
So, 6 people should be added to the line for there to be 40 people in total.

All except Rhea are kinds of fishes.

All except Cube are circular figures

All except Aluminium all are magnetic materials.