SEC 3 CA1 EXTRA ASSIGNMENT

From the list of numbers 61, 62, 63, 64, 65, 66, 67, 68, 69, write down a square number.

• 64

• 62

• 67

• 69

From the list of numbers 61, 62, 63, 64, 65, 66, 67, 68, 69, write down a multiple of 13.

• 65

• 62

• 67

• 68

From the list of numbers 61, 62, 63, 64, 65, 66, 67, 68, 69, write down a factor of 186.

• 62

• 61

• 67

• 65

From the list of numbers 61, 62, 63, 64, 65, 66, 67, 68, 69, write down the prime numbers.

• 61, 67

• 62, 67

• 63, 67

• 61, 63

126 = 2 × 3² × k. Find the value of k.

• 7

• 6

• 9

• 3

Write 90 as the product of its prime factors.

• 2 × 3² × 5

• 2 × 5² × 3

• 3 × 3 × 5 × 2

• 2 × 3 × 15

Find the lowest common multiple (LCM) of 90 and 126.

• 630

• 180

• 252

• 1134

Find the smallest multiple of 7 that is greater than 100.

• 105

• 107

• 112

• 102

Find the largest cube number that is less than 100.

• 64

• 27

• 81

• 125

Find the six factors of 45.

• 1, 3, 5, 9, 15, 45

• 1, 2, 3, 5, 9, 45

• 1, 3, 5, 7, 9, 45

• 1, 3, 5, 9, 15, 40