1.
What is the additive identity element in the set of whole numbers?
2.
Period of the decimal 2.3636363....... is :
3.
What is the remainder when (2x² + 3x +7) is divided by (x + 2)?
4.
If the product of two integers is 72 and one of them is − 9, then find the other integer.
5.
Twelve persons can make 480 toys in eight days. How many toys can 21 persons make per day?
7.
What is the smallest positive irrational number?
8.
a6 < 1000, Find the greatest possible values of the whole number 'a'.
9.
If four seventh of 49% of a number is 35, find the number.
10.
Find the least natural number which when divided by 6, 7, 9, 12 and 18 leaves no remainders.
11.
What is the multiplicative identity element in the set of whole numbers?
12.
The HCF of two numbers is 6 and the product of two numbers is 360. Find the LCM of the numbers.
13.
In how many years will a certain sum becomes seven times of itself at 15% per year simple interest ?
14.
ab x ba,= 72 and a or b ≠ 1. Find the possible positive values of a + b.
15.
Given that a + b + c = 0, find: √( xa . xb . xc )
16.
If x : y =2 : 3 and z : y =4 : 6, then find x : z
17.
A shopkeeper bought 10 kg. of rice for Rs 210, 5 kg. of rice at Rs 16 per kg and 0.5kg. for Rs 20. Find the average cost of the rice per kg.
18.
A train covers the distance between two cities in 12 hours. How much time will a car take which has an average speed of 1.2 times that of the train .
19.
40% of 175 + 175% of 60 =
20.
If 243 is the third proportional of a : b, where b : a =9:1, find the values of a and b.
