 1. The monthly telephone bill has a fixed tariff of Rs. 250 for upto a 50 outgoing calls. For over 50 calls, there is a charge of Rs 1.25 per call. The ratio of the bills paid by A and B for Jan is 2:3 and the no. of outgoing calls made by A is 90, then what is the no. of outgoing calls made by B?
• 210
• 250
• 160
• 180
• None of the above

1. The cost (C) of a certain type of marble varies directly as the square root of its surface area (A) when its thickness (T) is constant and C varies directly as the square of T when A is constant. If the cost of a piece of a marble of surface area 1600 sq cm and thickness 3cm is Rs. 360, what is the cost of a marble piece of area 900 sq cm and thickness 4cm?
• 360
• 480
• 540
• 600
• None of the above

1. The radii of cylinders of equal height vary directly with the square root of their volumes. The radii of cylinders of equal volume vary inversely as the square root of their heights. The radius of a cylinder is 10 cm when its volume is 1500 cu cm and height is 5cm. Find the radius of the cylinder of volume 2400 cu cm and height 2cm.
• 10cm
• 15cm
• 20cm
• 25cm
• None of the above

1. The mass of a liquid varies directly with its volume. The mass of a liquid is 12 gm when its volume is 15 cu cm. Find the mass of the liquid if its volume is 25 cu cm.
• 24gm
• 30gm
• 20gm
• 18gm
• None of the above

1. If x:y:z = 3:5:7 and a = 2x, b=3y and c=6z, then a:b:c = ?
• 2:3:6
• 2:5:14
• 5:8:13
• 1:2:1
• None of the above

1. Average age of a family of four members is 20. What is the average age of the same family of 4 members after 4 years?
• 21
• 24
• 28
• 36
• None of the above

1. A bag contains 2 kg of potatoes and 3 kg of tomatoes. If the cost of potatoes is Rs. 5 per kg and of tomatoes is Rs. 8 per kg, then what is the average price per kilogram of the vegetables in the bag?
• 6
• 6
• 8
• 7
• None of the above

1. The average income per person for a family of 5 members is Rs. 8000 per month. In a particular month, every member got Rs. 800 less than the usual. What is the average income per person for that month?
• 4k
• 2k
• 6k
• 4k
• None of the above

1. The average age of a couple when they got married was 30 years. Three years after their marriage a child was born to them. The present average age of the couple and the child is 34 year. Find the present age of the child
• 16
• 15
• 12
• 10
• None of the above

1. A group of 20 friends went to a hotel. 16 of them paid Rs. 50 each and the remaingin four paid Rs. 10, Rs. 15, Rs. 25 and Rs. 30 more than the average amount paid by all. Find the total bill.
• 1040
• 1180
• 1100
• 1200
• None of the above

1. By diluting 20 lts of milk and selling it at its CP, a milk man makes 25% profit. Find the quantity of water added.
• 2 L
• 3 L
• 4 L
• 5 L
• None of the above

1. How many bananas at 5 for Rs. 23 should be mixed with 200 bananas at 7 for Rs. 42, so as to sell them at Rs. 72 per dozen with a 20% gain?
• 200
• 300
• 400
• 500
• None of the above

1. Find the ratio in which a shopkeeper should mix two varieties of coffee costing Rs. 140 per kg and Rs. 180 per kg so that by selling it at Rs. 165 per kg he makes a profit of 10%?
• 1:3
• 3:1
• 4:1
• 5:1
• None of the above

1. The average of the marks obtained by 54 students in a class is 82. Find the marks of the top scorer, if the average marks of the others is 1 less than the average marks of all the students in the class.
• 128
• 130
• 140
• 135
• None of the above