Math Puzzle 3

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This math puzzle 3 is on LCM,Wages,numbers.

1) There are 40 coins in a bag, consisting of $ 5 and $ 2 coins. If the total amount is Rs. 140, how many $ 2 and $ 5 coins are there in the bag?
(1) 20 each    (2) 25 and 15    (3) 30 and 10    (4) 22 and 18

2) Four years ago, the average age of A and B was 18 years. At present the average age of A, Band C is 24 years. What would be the age of C after 8 years?
(1) 30 years    (2) 36 years   (3) 28 years    (4) 25 years

3) The marks obtained by 10 students in Science (out of 50) are 30, 41, 40, 41, 30, 41, 30, 28, 41, 40. The modal mark is:
(1) 40   (2) 30    (3) 41   (4) 35

4) 6, 18, 24, 9, 27, 33, 11?, ?
(1) 15, 19   (2) 22, 27   (3) 33, 39   (4) 44, 47

5) The area of the base of a right cone is 154 m2 and its volume is
308 m3. The height of the cone is:

(1) 8 m    (2) 6 m    (3) 7 m   (4) 9 m

6) The L.C.M. of two numbers is 12 times their H.C.F.. The sum of the H.C.F. and L.C.M. is 403. If one number is 93, then the other number is:
(1)134   (2) 124    (3) 128    (4) 310

7) The wages of 10 workers for a six-day week is Rs. 1200. What are the one day’s wages of 4 workers?
(1) $ 40    (2)$ 32   (3)$ 80   (4)$ 24

8) All natural numbers and 0 are called the _______ numbers.
(1) whole    (2) prime   (3) integer   (4) rational

9) X gives ½ of his property to his wife and ½ of the rest of his son. The remainder is divided equally to his two daughters. The share of each daughter is:
(1) 1/8    (2) 1/6    (3) ¼    (4) 2/3

Math puzzle 3

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