Periyar University 2008 B.E Electronics

107) The cost of 1 pencil, 2 pens and 4 erasers is Rs.22 while the cost of 5 pencils, 4 pens and 2 erasers is Rs.32.How much will 3 pencils, 3 pens and 3 erasers cost?

Ans: 27




108) A shopkeeper bought a watch for Rs.400 and sold it for Rs.500.What is his profit percentage?

Ans. 25%



109) What percent of 60 is 12?

Ans. 20%




110) 3 men goes to a hotel to stay, the clerk says $30 per room/day so all the 3 plans to stay in 1 room so every pays $10.After a few time the clerk realizes that he made a mistake of collecting $30 but the room cost only $25, there fore he decides to return $5 to them so he calls the room boy and provide him $5 asking him to return. The room boy keeps $2 with him and he returns only $3($1 for each).Now Totally all have paid $9 each($27)+room boy $2 which is equal to $27.where did $1 go, who has made the mistake?






111) 2 pencils cost eight cents. Then five pencils cost?

Ans :( 20 cents)




112)Which is more economical of the subsequent
a)2kg -- 30/- b)8kg -- 160/- c)5kg -- 80/-



113)Satish earns 240 weekly.12% of big amount + earning weekly = 540
what is the big amount
a)3200 b)3600 c)2500 d)1000

Ans: c
114) Bhanu spends 30% of his income on petrol on scooter. ¼ of the remaining on house rent and the balance on food. If he spends Rs.300 on petrol then what is the expenditure on house rent? a) Rs.525 b) Rs.1000 c) Rs.675 d) Rs.175

Ans: 175
115) A sporting goods store ordered an equal number of white and yellow balls. The tennis ball company delivered 45 extra white balls, making the ratio of white balls to yellow balls 1/5: 1/6. How many white tennis balls did the store originally order for?
a) 450 b) 270 c) 225 d) None of these


Ans: 180



116) There is a circular pizza with negligible thickness that is cut into 'x' pieces by four straight line cuts. What is the maximum and minimum value of 'x' respectively?
a) 12, six b) 11, six c) 12, five d) 11, 5



117) Match the following:

Earning:   Approval pending.