Showing Mcqs of math -- (543)

10 men can do a price of work in 20 days how long will it take 8 men to do the job if they work at the same speed:

22

25

30

23

25 ^ 2 + 2(25)(15) + 15 ^ 2 = :

1220

1600

1800

2500

14 ^ 2 + 2(14)(16) + 16 ^ 2 =

28

48

900

1220

1/9 / (1/9) =

19/90

9/19

8/40

none

3/5 / 13/12    5/9 /12/11    9/13 /11/3=?

9/169

12/123

7/47

none

 If n is an odd number, which of the following represents the third odd number following n?

n + 3

n + 4

n + 6

3n +4

 If n is the first number in a series of three consecutive even numbers, which of the following represents the sum of three numbers:

3n+6

n+2

n-6

3n-6

 If n is any integer, which of the following is always an odd integer:

n - 1

n + 2

2n+2

none

For a certain student, the average of ten test scores is 80. If the highest and lowest scores are dropped, the average of the remaining scores is 82. What is the average of the highest and lowest scores: 

70

71

72

73

48 (1) +48 (2)+48 (3) +48 (4):

48

56

960

480