Arithmetic Section
1. A man covers 2/5 of a distance at 40 km/h and the rest at 60 km/h. Find his average speed for the whole journey.
2. The ratio of the ages of A and B is 4 : 5. After 5 years, the ratio becomes 5 : 6. Find their present ages.
3. A can complete a work in 20 days, B in 25 days. They work together for 5 days, then A leaves. In how many more days will B finish the remaining work?
4. A shopkeeper marks up an article by 25% and gives a discount of 10%. Find his profit or loss percentage if the cost price is ₹480.
5. A sum of money doubles itself in 8 years at simple interest. In how many years will it become three times?
6. A man’s salary is increased by 20% and then decreased by 10%. Find the net percentage increase or decrease.
7. A train 150 m long passes a pole in 10 seconds. Find its speed in km/h.
8. The cost price of 12 pens is equal to the selling price of 10 pens. Find the profit percentage.
9. Two pipes can fill a tank in 20 min and 30 min respectively. A waste pipe can empty it in 15 min. If all are opened together, how long will it take to fill the tank?
10. The average of 7 consecutive odd numbers is 27. Find the smallest number.
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