class 9 maths ch 1 mcq

The periodicity of 4627.428571, is : 1. 4 2. 10 3. 6 4. 19

The period in 690.384615, is : 1. 384615 2. 690 3. 690384615 4. 6

The set of numbers that possess the property of density, is : 1. Z 2. Q 3. R 4. 2 and 3

The number whose multiplicative inverse is itself, is : 1. 0 2. 1 3.  any rational number 4. None of these