Test: Factors I - Normal

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Question 1:   Factorise using prime factors: 15=...
3×4
1×3×3
3×5
1×3×5
Question 2:   Factorise using prime factors: 40=...
1×2×5
1×2×2×2×5
2×2×5
2×2×2×5
Question 3:   Factorise: 9 x 2 -16=...
( 3x-1 )( 3x+4 )
( 3x-1 )( 3x+1 )
( x-4 )( x+4 )
( 3x-4 )( 3x+4 )
Question 4:   Factorise: 6 x 2 +2 x 3 =...
2 x 2 ( 3+x )
x 2 ( 6+2x )
x 2 ( 3+x )
2x( 3x+ x 2 )
Question 5:   Factorise: x 2 -5x=...
x( x-5 )
( x-5 ) 2
( x-1 )( x-5 )
x
Question 6:   Factorise: 4 x 2 -12x+9=...
( 2x-3 ) 2
( 2x-3 )( x-3 )
( 2x-5 ) 2
( x-3 ) 2
Question 7:   Factorise: x 10 - y 10 =...
( x 5 - y 5 ) x 5
( x 5 - y 5 ) 2
( x 2 - y 2 )( x 2 + y 2 )
( x 5 - y 5 )( x 5 + y 5 )
Question 8:   Factorise: 5 x 2 -20=...
( x-2 )( x+2 )
5( x-2 )( x+2 )
5( x 2 -4 )
5 ( x-2 ) 2
Question 9:   Factorise: 27 x 3 -8 y 3 =...
( 3x-2y )( 9 x 2 +6xy+4 y 2 )
( 3x-2y ) ( 3x+2y ) 2
( 3x-2y )( 9 x 2 -6xy+4 y 2 )
( 3x+2y )( 9 x 2 -6xy+4 y 2 )
Question 10:   Factorise: 16 x 2 +8xy+ y 2 =...
( 4x-y ) 2
( 4x+y )( x+y )
( 4x+y ) 2
( 4x+y )( 4x-y )