1. The average age of A and B is 20 years. If C were to replace A, the average would be 19 and if C were to replace B, the average would be 21. What are the ages of A, B and C. (1)
1. 22, 18, 20
2. 18, 22, 20
3. 22, 50, 18
4. 18, 20, 22
2. The price of sugar is decreased by 40% and its consumption is also decreased by 25%. Find the new expenditure as a ratio of initial expenditure. (1)
1. 9 : 20
2. 20 : 9
3. 7 : 4
4. 4 : 7
3. A certain sum is interested at compound. The interest accrued in the first two years is Rs. 272 and that in the first three years is Rs. 434. Find the rate percent. (2)
1.7 ½%
2.17 ½%
3.25%
4.12 ½%
4.Two equal glasses filled with mixture of alcohol and water in the proportions of 2 : 1 and 1 : 1 respectively were emptied into a third glass. What is the proportion of alcohol and water in the third glass? (4)
1.5 : 7
2.7 : 5
3.3 : 5
4.5 : 3
5.Any cyclic parallelogram having unequal adjacent sides is necessarily a (4)
1.Square
2.Rectangle
3.Rhombus
4.Trapezium