A) Less than 3 hr
B) More than 2 hr, but less than 4 hr
C) More than 4 hr, but less than 6 hr
D) More than 1 hr
Mathematics
Jerry estimates that there are m marbles in a jar. Harry knows the actual number of marbles (n) is within 10 marbles of Jerry’s estimate. Which inequality shows this relation?
A) n + 10 < m < n – 10
B) m – 10 < n < m + 10
C) n < m – 10
D) None of these
1/a × 1/b = 1, then the value of a-b-c is:
A) 0
B) 1
C) cannot determined
D) -1
We read 3/8 of the book one day and 4/5 of the pages the other day. If there were 400 pages unread, how many pages did the book contain?
A) 310 pages
B) 110 pages
C) 90 pages
D) 240 pages
5×0.06 =
(A) 0.02
(B) 0.03
(C) 0.04
(D) 0/05
If 35 labourers dig 805 cubic meters of earth in 5 hrs, how much of the earth will 30 labourers dig in 6 hrs:
(A) 630 m³
(B) 728 m³
(C) 828 m³
(D) None of these