CHAPTER-1 REAL NUMBERS CLASS 10

For some integer M,every even integer is of the form

• m

• 2m

• m+1

• 2m+1

If n is an even natural number,then the largest natural number by which n(n+1) (n+2) is divisible,is

• 6

• 12

• 24

• 8

The product of two consecutive positive integers is divisible by 2'

• TRUE

• FALSE

• CAN'T SAY

• NON OF THESE

The natural, 4n,where n is a natural number,ends with the digit 0 for any natural number n.

• TRUE

• FALSE

• CAN'T SAY

• PARTIALLY TRUE

12n ends with the digit 0 or 5 for natural number n

• 2

• 3

• NO VALUE

• 5

(3x5x7) + 7 is a

• PRIME NUMBER

• CANT SAY

• NONE OF THESE

• COMPOSITE NUMBER

The number (7x6x5x4x3x2x1)+5 is ................. number

• PRIME

• CAN'T SAY

• NONE OF THESE

• COMPOSITE

The total number of factors of a prime number is

• 1

• 2

• 0

• 3

A seminar is being conducted by an Educational Organisation, where the participants will be educators of different subjects. The number of participants in Hindi, English and Mathematics are 60, 84 and 108 respectively.

1. In each room the same number of participants are to be seated and all of them being in the same subject, hence maximum number participants that can accommodated in each room are

• 14

• 12

• 16

• 18

What is the minimum number of rooms required during the event?

• 11

• 21

• 31

• 41