1
GATE ECE 2012
MCQ (Single Correct Answer)
+2
-0.6
Raju has 14 currency notes in his pocket consisting of only Rs. 20 notes and Rs. 10 notes. The total money value of the notes is Rs. 230. The number of Rs. 10 notes that Raju has is
A
5
B
6
C
9
D
10
2
GATE ECE 2011
MCQ (Single Correct Answer)
+2
-0.6
Three friends, R, S and T shared toffee from a bowl. R took 1/3rd of the toffees, but returned four to the bowl. S took 1/4rd of what was left but returned three toffees to the bowl. T took half of the remainder but returned two back into the bowl. If the bowl had 17 toffees left, how many toffees-were originally there in the bowl?
A
38
B
31
C
48
D
41
3
GATE ECE 2011
MCQ (Single Correct Answer)
+2
-0.6
Given that f(y) = |y| / y, and q is any non-zero real number, the value of | f(q) - f(-q) | is
A
$$0$$
B
-1
C
1
D
2
4
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
$$\left(4/81\right)\;\left[10^\mathrm n\;-\;9\mathrm n\;-\;10\right]$$
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