31.

Of three numbers, the second is thrice the first and the third number is three-fourth of the first. If the average of the three number is 114, the largest number is

• 72

• 216

• 354

• 354

A car covers  of the distance from A to B at the speed of 8km/hr,  of the distance at 25 km per hour and the remaining at the speed of 20 km per hour. Find the average speed of the whole journey.

• 12.625 km/hr

• 13.625 km/hr

• 14.625 km/hr

• 14.625 km/hr

A jar contains 10 red marbles and 30 green ones. How many red marbles must be added to the jar so that 60% of the marbles will be red?

• 25

• 30

• 35

• 35

If a number multiplied by 25% of itself gives a number which is 200% more than the number then the number is

• 12

• 16

• 20

• 20

The value of an article depreciates every year at the rate of 10% of its value. If the present value of the article is ₹ 729, then its worth 3 years ago was

• ₹ 1250

• ₹ 1000

• ₹ 1125

• ₹ 1125

The price of onions has been increased by 50%. In order to keep the expenditure on onions the same the percentage of reduction in consumption has to be

• 50%

• 

• 33%

• 33%

Walking at 3 km per hour, Pintu reaches his school 5 minutes late. If he walks at 4 km per hour he will be 5 minutes early. The distance of Pintu's school from his house is

• 

• 2 km

• 
• 

Nitin bought some oranges at ₹ 40 a dozen and an equal number at ₹ 30 a dozen. He sold them at ₹ 45 a dozen and made a profit of ₹ 480. The number of organes, he bought, was

• 48

• 60

• 72

• 72

A man buys two chairs for a total cost of ₹ 900. By selling one for  of its cost and the other for  of its cost, he makes a profit of ₹ 90 on the whole transaction. The cost of the lower priced chair is

• ₹ 360

• ₹ 400

• ₹ 420

• ₹ 420

By selling 100 oranges, a vendor gains the selling price of 20 oranges. His gain percent is

• 20

• 25

• 30

• 30