Week 3- mathematics

Find the LCM of 2, 3, 5 and 7

• 75

• 95

• 105

• 210

Find the HCF of 15, 18 and 24

• 3

• 6

• 30

• 45

What is the smallest number that can be divided exactly by 2 and 3?

• 5

• 6

• 7

• 8

Find the LCM of 12, 15 and 18

• 180

• 160

• 36

• 3

List all the prime factors of 12

• 1,2

• 1,2,3,

• 1,2,3,4,6

• 2,3

Express 90 as a product of its prime factors.

• 2×3×5

• 3×4×5

• 2×3×3×5

• 3×4×4×5

What is the least number that can be divided exactly by 5, 7 and 8

• 153

• 135

• 315

• 305

Find the HCF of 2×3×5²×7 and 3²×5²×7²

• 3²×5²×7²

• 2×3³×5⁴×7²

• 2×3²×5²×7²

• 3×5²×7

Write 4200 in index form

• 2²×3²×5×7

• 2⁴×3²×5×7

• 2²×3²×5²×7²

• 2³×3×5²×7

Express 270 as a product of its prime factors

• 2×2×3×3×5

• 3×3×5×

• 2×3×5×9

• 2×3×3×3×5