1.
In how many years will a certain sum becomes seven times of itself at 15% per year simple interest ?
2.
Number of terms in the expansion (a + b) (c + d) is --------
3.
Find the total surface area of a cube of edge 12.5 cm.
4.
Period of the decimal 2.3636363....... is :
5.
If the sum of two integers is − 35 and one of them is 17, then find the other integer.
6.
40% of 175 + 175% of 60 =
7.
B can do three - fourth of a work in 6 days and A can do half of the same work in 4 days. In how many days can both A and B can do the same work?
8.
What is the smallest positive irrational number?
9.
If the product of two integers is 72 and one of them is − 9, then find the other integer.
10.
Twelve persons can make 480 toys in eight days. How many toys can 21 persons make per day?
11.
Find the H.C.F. of 63 and 109.
12.
If p + q =15 and pq=54, then p - q can be
14.
If x% of 2.4 is 18/25, then find x.
15.
a6 < 1000, Find the greatest possible values of the whole number 'a'.
17.
What distance will a train cover in 1.2 minute travelling at 72 km/h ?
18.
What should be subtracted from x³ + 2x² -3x +6, so that the difference is a multiple of x − 2 ?
19.
If r³ = 1728, then find r.
20.
(2x − 6y)² - (6y + 8x)²= ?
