Staff Selection Commission
Data Entry Operator Exam Held on - 28-11-2010 (1st Sitting)

Numerical Aptitude

1. Three taps A, B and C together can fill an empty cistern in 10 minutes. The tap A alone can fill it in 30 minutes and the tap B alone in 40 minutes. How long will the tap C alone take to fill it?
(a) 16 minutes
(b) 24 minutes
(c) 32 minutes
(d) 40 minutes

2. If 1 man or 2 women or 3 boys can complete a piece of work in 88 days, the 1 man, 1 women and 1 boy together will complete it in
(a) 36 days
(b) 42 days
(c) 48 days
(d) 54 days

3. If the measures of one side and cone diagonal of a rhombus are 10 cm and 16 cm respectively, then its are in cm2 is:
(a) 60
(b) 64
(c) 96
(d) 100

4. The diameters of two cylinders, whose volumes are equal, are in the ratio 3 : 2. Their height will be in the ratio
(a) 4 : 9
(b) 5 : 6
(c) 5 : 8
(d) 8 : 9

5. The single discount, which is equivalent to successive discounts of 25% and 10%, is:
(a) 35 %
(b) 34.5 %
(c) 33 %
(d) 32.5 %

6. A trader marks his goods 40% above cost price and allows a discount of 25%. The profit he makes, is:
(a) 15%
(b) 10%
(c) 5%
(d) 2%

7. With a 5% discount on the cost of sugar, a buyer could purchase 2 kg more sugar for Rs. 608. Selling price of sugar is:
(a) Rs. 15.50
(b) Rs. 15
(c) Rs. 16.50
(d) Rs. 2

8. The ratio of two numbers is 3 : 4 and their LCM is 48. The sum of the two numbers is:
(a) 32
(b) 28
(c) 26
(d) 24

9. If 2A = 3B = 4C, then A : B : C is:
(a) 2 : 3 : 4
(b) 4 : 3 : 2
(c) 6 : 4 : 3
(d) 3 : 4 : 6

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