2nd assignment

Subtract 7 from double the number x = ...................

• x-7

• 2x-7

• 7x-2

• 14x

The sum of two numbers is 15, the smaller is x, then the greater number is .....................

• x+15

• 15x

• 15-x

• x-15

If the side length of the square is s, its perimeter is P, then the mathematical relation between s and

p is ....................

• P= 4s

• P= s+4

• P= s-4

• P= 4-s

The square whose diagonals are 8 cm , then its area is ............ cm²

• 64

• 32

• 16

• 4

The additive identity element in N is ..............

• 0

• 1

• 2

• 3

The circumference of a circle whose radius is r cm long is ..........

• π r

• 2 π r

• 2 π

• 4 π r

Mona is x years old now, how will she be after 5 years?

• 5x

• 5 + x

• 5 - x

• x - 5

If x + 5 = 11 , then x = ..........

• 5

• 8

• 6

• 11

complete in the same pattern:

1, 4 , 8, 13, .......

• 14

• 16

• 19

• 21

complete in the same pattern:

0, 4 , 8, 12, .......

• 16

• 18

• 21

• 24