Q. The G.C.M. and L.C.M. of the two numbers are 17 and 255 respectively and one of them is 51. The other number must be -
1) 68
2) 85
3) 34
4) 87
Q. A certain sum lent out at simple interest doubles itself in 20 years. The number of years in which this sum trebles itself at the same rate of interest is -
1) 30
2) 40
3) 25
4) 20
Q. An express train leaves station A at 6.45 PM and reaches station B 150 km away at 10.30 PM. The time taken by the train to reach the next station C at a distance of 160 km away from station B with the same speed is -
1) 4 hours
2) 3 hours
3) 3.5 hours
4) 4.25 hours
Q. A and B together can do a piece of work in 10 days. If A alone can do it in 15 days, then the time taken by B to do the same work alone is -
1) 15 days
2) 20 days
3) 25 days
4) 30 days
Q. A sum of money is divided into two parts in the ratio 5 : 3. If the smaller sum is Rs.384, then the total sum of money was -
1) Rs. 1,024
2) Rs. 640
3) Rs. 820
4) Rs. 764
Q. A man purchased a pen for Rs. 320. If he sold it for Rs. 360, then his gain percent was -
1) 40%
2) 25%
3) 12.5%
4) 15%
Q. If 3 pieces of tablecloth cost Rs. 112.50, then the number of pieces of tablecloth available for Rs.487.50 is -
1) 11
2) 13
3) 15
4) 17
Q. Ten years ago, the ages of the father and the son were in the ratio 6 : 1 and 10 years hence the ratio will become 2 : 1. The present age of the father is -
1) 35 years
2) 25 years
3) 30 years
4) 40 years
Q. A book-seller buys books at a commission of 20% on the marked price. If he sells the books at the marked price. Then his gain percentage will be -
1) 20%
2) 25%
3) 10%
4) 30%
Q. The sale price of 2 oranges is equal to the cost price of 3 oranges. The gain percentage is -
1) 40%
2) 50%
3) 25%
4) 20%
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