Q3.If the HCF of two positive integers is 26. Then, their LCM cannot be
(a) 78
(b) 104
(c) 144
(d) 234
Q4.30 pineapple trees, 45 orange trees and 60 mango trees have to be planted in rows such that each row contains the same number of trees of one variety only. What is minimum number of rows in which the trees may be planted?
(a) 10
(b) 15
(c) 25
(d) 9
Q5.What is the greatest possible length of a scale that can be used to measure exactly the lengths 300m, 510m and 1290 cm?
(a) 30m
(b) 50m
(c) 70m
(d) 80m
Q11.The average age of a family of 6 members is 22 years. If the age of the youngest member be 7 years, then what was the average age of the family at the birth of the youngest member?
(a) 16 years.
(b) 24 years.
(c) 18 years.
(d) 19 years.
Q12.A sold a watch to B at 20% gain and B sold it to C at a loss of 10%. If C bought the watch for Rs. 216, at what price did A purchase it?
(a) Rs. 200
(b) Rs. 216
(c) Rs. 250
(d)Rs. 176
Q13.A pen is listed for Rs. 12. A discount of 15% is given on it. A second discount is given bringing the price down to Rs. 8.16. The rate of second discount is:
(a) 15%
(b) 18%
(c) 20%
(d)25%
Q14.A shopkeeper gives two successive discounts on an article marked Rs. 450. The first discount given is 10%. If the customer pays Rs. 344.25 for the article, the second discount given is:
(a) 10%
(b) 12%
(c) 14%
(d) 15%
Q15.A vendor sells lemons at the rate of 5 for Rs. 14, gaining thereby 40%. For how much did he buy a dozen lemon?
(a) Rs. 20
(b) Rs. 21
(c) Rs. 24
(d) Rs. 28
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