a + b
(a + b) (a - b)
None of these
A man spends of his income on food, of it on house rent and the remaining which is on other commodities. Find his house rent.
Mr. Sharma rents a car for d days. He pays p rupees per day for each of the first 7 days, and half that rate for each additional day. Find the total charge if d > 7.
A certain type of board is sold only in lengths of multiplies of 2 metres. The shortest board sold is 6 metres and the longest is 24 metres. A builder needs a large quantity of this type of board in metres lengths. For minimum waste, the lengths to be ordered should be-
10 metres
12 metres
22 metres
24 metres
How many of the numbers between 100 and 300 begin or end with 2 ?
60
90
91
110
A zoo has 4 times as many gorillas as tigers. There are 4 more tigers than there are zebras at the zoo. If z represents the number of zebras, in terms of z, how many gorillas are in the zoo ?
4z + 3
z + 4
z + 8
4z +16
If 3 x +2 y = 5 a + b, and 4 x - 3 y = a + 7 b, then x is equal to -
a - 2 b
2 a + b
5 a - 6 b
If n is the first of two consecutive odd integers, and if the difference of their squares is 120, which of the following equations can be used to find their values ?
