1.
What do you call two fractions, whose product is 1 ?
2.
Which of the following sets is not closed under subtraction?
3.
What is the smallest positive irrational number?
4.
If two numbers are equal, then:
5.
If 64 > x³, then the greatest possible integer value of x is :
6.
If the sum of two integers is − 35 and one of them is 17, then find the other integer.
7.
If four seventh of 49% of a number is 35, find the number.
9.
The expanded form of (x + y ) (x - y) is a :------
10.
15 men, working at 8 hours a day, can do two third of a piece of work in 16 days. In how many days can 18 men working at 10 hours a day do ¼ of the same work ?
12.
The HCF of two numbers is 6 and the product of two numbers is 360. Find the LCM of the numbers.
13.
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?
15.
Find the H.C.F. of 63 and 109.
16.
Twelve persons can make 480 toys in eight days. How many toys can 21 persons make per day?
17.
Given that a + b + c = 0, find: √( xa . xb . xc )
18.
Which of the following is/are perfect squares?
19.
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.
20.
ab = ba but b ≠ a, then find a + b.
