1
GATE CSE 2021 Set 1
+2
-0.67
Items Cost Profit% Marked price
P 5400 - 5860
Q - 25 10000

Details of prices of two items P and Q are presented in the above table. The ratio of cost of item P to cost of item Q is 3 : 4. Discount is calculated as the difference between the marked price and the selling price. The profit percentage is calculated as the ratio of the difference between selling price and cost, to the cost

(Profit% = $${{Selling\,price - Cost} \over {Cost}} \times 100$$).

The discount on item Q, as a percentage of its marked price, is ________.
A
25
B
10
C
5
D
12.5
2
GATE CSE 2020
+2
-0.67
If P = 3, R = 27, T = 243, then Q + S = ______.
A
110
B
40
C
80
D
90
3
GATE CSE 2020
+2
-0.67
Two straight lines are drawn perpendicular to each other in X-Y plane. If $$\alpha$$ and $$\beta$$ are the acute angles the straight lines make with the X-axis, then $$\alpha$$ + $$\beta$$ is ______.
A
60o
B
90o
C
120o
D
180o
4
GATE CSE 2020
+2
-0.67
The figure below shows an annular ring with outer and inner radii as b and a, respectively. The annular space has been painted in the form of blue colour circles touching the outer and inner periphery of annular space. If maximum n number of circles can be painted, then the unpainted area available in annular space is _______.
A
$$\pi \left[ {\left( {{b^2} - {a^2}} \right) - {n \over 4}{{\left( {b - a} \right)}^2}} \right]$$
B
$$\pi \left[ {\left( {{b^2} - {a^2}} \right) - n{{\left( {b - a} \right)}^2}} \right]$$
C
$$\pi \left[ {\left( {{b^2} - {a^2}} \right) + n{{\left( {b - a} \right)}^2}} \right]$$
D
$$\pi \left[ {\left( {{b^2} - {a^2}} \right) + {n \over 4}{{\left( {b - a} \right)}^2}} \right]$$
GATE CSE Subjects
EXAM MAP
Medical
NEET