1
GATE ECE 2011
MCQ (Single Correct Answer)
+2
-0.6
The sum of n terms of the series 4 + 44 + 444 +.... is
A
$$\left(4/81\right)\;\left[10^{\mathrm n+1}\;-\;9\mathrm n\;-\;1\right]$$
B
$$\left(4/81\right)\;\left[10^{\mathrm n-1}\;-\;9\mathrm n\;-\;1\right]$$
C
$$\left(4/81\right)\;\left[10^{\mathrm n+1}\;-\;9\mathrm n\;-\;10\right]$$
D
$$\left(4/81\right)\;\left[10^\mathrm n\;-\;9\mathrm n\;-\;10\right]$$
2
GATE ECE 2011
MCQ (Single Correct Answer)
+2
-0.6
The fuel consumed by a motorcycle during a journey while traveling at various speeds is indicated in the graph below. GATE ECE 2011 General Aptitude - Numerical Ability Question 58 English 1

The distances covered during four laps of the journey are listed in the table below

GATE ECE 2011 General Aptitude - Numerical Ability Question 58 English 2

From the given data, we can conclude that the fuel consumed per kilometre was least during the lap

A
P
B
Q
C
R
D
S
3
GATE ECE 2010
MCQ (Single Correct Answer)
+2
-0.6
If 137+276=435 how much is 731+672?
A
534
B
1403
C
1623
D
1513
4
GATE ECE 2010
MCQ (Single Correct Answer)
+2
-0.6
5 skilled workers can build a wall in 20 days; 8 semi-skilled workers can build a wall in 25 days; 10 unskilled workers can build a wall in 30 days. If a team has 2 skilled, 6 semi-skilled and 5 unskilled workers, how long will it take to build the wall?
A
20 days
B
18 days
C
16 days
D
15 days
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