7. the largest measuring cylinder that can accurately fill 3 tanks of capacity 98,182 and 266 litres each, is of capacity:
a. 2litres b. 7litres c. 14litres d. 98litres

8. in a scheme, a pack of three soaps with mrp rs45 is available for rs42. if it still gives a profit of 5% to the shopkeeper,then the cost price of the pack is:
a. rs40 b. rs37 c. rs41 d. rs35

9.An air conditioner can coo the hall in 40 miutes while another takes 45 minutes to cool under similar conditions. if both air conditioners are switched on at same instance then how long will it take to cool the room?
a. about 22 minutes b. about 20 minutes c. about 30 minutes d. about 25 minutes

10.A man sells 12 candies for rs12 and loses rs 2.40. if he sells 12 candies for rs 16. how much does he gain or loss?
a. gain rs4 b. loses rs6 c. gain rs6.40
d. loses rs 1.60 e. gains rs1.60

• 7)c
  8)a
  9)a
  10)e
  
  Solution 7: 98,182,266 all are divisible by 14
  So ans 14 litres (you take HCF also)
  
  Solution 8: C.P=x ,M.P=45,S.P=42
  (42-x)/x=0.05
  x=40
  
  Solution 9: A cools at 40min other at 45min together = (45*40)/85 = 21.1764 = about 22 min
  
  Solution 10: 12 candles for 12 had a loss of rs 2.40
  So C.P ia 14.40 for 12 candles
  Now 16 for 12
  So 16-14.40= 1.60
  Had a gain of rs 1.60
  
• 9 years agoHelpfull: Yes(11) No(0)
• 8)Given M.P=45,S.P=42, Profit = 0.05
  
  Let C.P=x , Then
  
  Profit = (42-x)/x = 0.05
  => x = 40.
• 5 years agoHelpfull: Yes(1) No(0)
• 10 its option(a) he sells 12 candies for rs.16 thn he gains rs.1.33 for each candy thn for 12 candies he gains 3.96 ( 1-1.33= 0.33) (0.33*12=3.96)appro its rs 4 hence he gains rs 4
• 8 years agoHelpfull: Yes(0) No(0)
• 7. ANS : c) 14L
  Largest measuring cylinder means HCF . Find HCF of the 3 capacities
  HCF of 98,182,266 = 14
  
  8.ANS : a) Rs 40
  Price of the pack = 42
  x*105/100=42 . 105=100(Price of soap pack) + 5(profit)
  x=42*100/105=2*100/5=40
  
  9. a) 22 min
  Take LCM of 40 and 45 = 360
  40*9=360 / 45*8=360.
  So if both are switched on together , room cooled in 360/(8+9)=360/17=21.16 minutes
  21.16 can be round to 22 minutes , so about 22 minutes
  
  10.ANS : e) gains 1.6
  12 candles = 12 rupees . Lose = 2.4
  So actual cost = 12+2.4=14.4 rupees .
  So if he sells for 16 rupees then he gains 16-14.4=1.6 rupees!
• 8 years agoHelpfull: Yes(0) No(0)
• 9)Let the two conditioners be A and B
  
  'A' cools at 40min
  
  'B' at 45min
  
  Together =(axb)/(a+b) = (45x40)/85 = 21.1764 = (approx) 22 min.
• 5 years agoHelpfull: Yes(0) No(0)
• 8)let us take s.p=42
  profit% is=5
  then (42/100)*5==2.1
  then 42-2.1=39.9(approx==40)
• 5 years agoHelpfull: Yes(0) No(0)