# Arithmetic Ability MCQ SET I

## Arithmetic Ability MCQ SET I

(1) 40 L of a mixture of milk and water contains 10% of water, the water to be added , to make the water content 20% in the new mixture is

(a) 6 L

(b) 6.5 L

(c) 5.5 L

(d) 5 L

(2) In an alloy, the ratio of copper and zinc is 5 : 2. If 1.250 kg of zinc is mixed in 17 kg 500 g of alloy, then the ratio of copper and zinc will be

(a) 2:1

(b) 2:3

(c) 3:2

(d) 1:2

(3) The length of a rectangle is decreased by 10 % and its breadth increased by 10%. By what per cent is its area changed ?

(a) 100%

(b) 0%

(c) -1%

(d) 6%

(4) A student multiplying a number by 3/5 instead of 5/3. What is percentage error in the calculation ?

(a) 64%

(b) 34%

(c) 45%

(d) 54%

(5) If the length of a rectangle is increased by 25% and the width is decreased by 20%, then the area of the rectangle

(a) decrease by 10%

(b) increase by 5%

(c) remains unchanged

(d) decrease by 5 %

(6) A trader marks his goods at 20% above the cost price. If he allows a discount of 5% on the marked price, what profit per cent does he make ?

(a) 16%

(b) 19%

(c) 14%

(d) 17%

(7) The square root of (2722 – 1282) is

(a) 144

(b) 8

(c) 256

(d) 240

(8) A candidate who can gates 20% marks in an examination fails by 30 marks but another candidate who gets 32% gets 42 marks more than the pass mark. Then, the percentage of pass marks is

(a) 36%

(b) 25%

(c) 54%

(d) 50%