1.
If 496 x 492 = x² - 4 (x>0), then x=--------
3.
A 240 m long train running at 72 km/h crosses another train coming from opposite direction at a speed of 90 km/h in 12 seconds. Find the length of the other train.
5.
The expanded form of (x + y ) (x - y) is a :------
6.
2a = 4b = 8c = 64. Find a² + b² + c².
7.
What is the multiplicative identity element in the set of integers?
8.
If r³ = 1728, then find r.
9.
The L.C.M. of two numbers is 525 and the product of two numbers is 2625. Find the H.C.F.
10.
If 64 > x³, then the greatest possible integer value of x is :
11.
Which of the following is a perfect square?
12.
Simplify 29 x 76 - 71 x 29
13.
If two numbers are equal, then:
14.
If four seventh of 49% of a number is 35, find the number.
15.
The average weight of 30 boys is 57 kg and average weight of 25 girls is 35 kg. Find the average weight of the class.
16.
Twelve men, working at 8 hours a day, can do ½ of a piece of work in 9 days. In how many days can 24 men working at 6 hours a day can do ¾ of the same work ?
17.
a6 < 1000, Find the greatest possible values of the whole number 'a'.
18.
What distance will a train cover in 1.2 minute travelling at 72 km/h ?
19.
If 243 is the third proportional of a : b, where b : a =9:1, find the values of a and b.
20.
√X is a perfect square. Which of the following is/are true?
