1. How many litres of water should be added to a 30 litre mixture of milk and water containing milk and water in the ratio of 7 : 3 such that the resultant mixture has 40% water in it?
(a)5 (b)2 (c)3 (d)8 (e) 7
2. The S.I on certain sum of money for 15 months at rate of 7.5% per annum exceed the S.I on same sum at 12.5% per annum for 8 months by Rs 3250 find sum?
(a)160000 (b)20000 (c) 170000 (d)18000 (e)312000
3. What is the difference between the compound interests on Rs. 5000 for 1 years at 4% per annum compounded yearly and half-yearly?
(a)2 (b)3 (c)4 (d)8 (e)none of these
4. A and B started a business with initial investments in the ratio 5 : 7. If after one year their profits were in the ratio 1 : 2 and the period for A’s investment was 7 months, B invested the money for
(a) 6 months (b) 2 ½ months (c) 10 months (d) 4 months (e) 7 months
5. An army lost 10% its men in war, 10% of the remaining due to diseases and 10% of the rest were disabled. Thus, the strength was reduced to 729000 active men. Find the original strength.
(a) 1000000 (b) 1200000 (c) 1500000 (d) 1800000 (e) none of these
Directions (6–10): What will come in the place of the question mark (?) in the following number series?
6. 48, 23, ?, 4.25, 1.125
(a) 10.5 (b) 10 (c) 2.5 (d) 11 (e) None of the above
7. 2, 15, 41, 80, 132, ?
(a) 197 (b) 150 (c) 178 (d) 180 (e) None of the above
8. ?, 15, 75, 525, 4725, 51975
(a) 5 (b) 10 (c) 8 (d) 6 (e) None of the above
9. 4, 19, 49, ?, 229
(a) 75 (b) 109 (c) 65 (d) 169 (e) None of the above
10. 840, ?, 420, 140, 35, 7
(a) 408 (b) 840 (c) 480 (d) 804 (e) None of the above
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MAHENDRA GURU