Gwers Blasu Bl .11

Beth yw term nesaf y gyfres / What is the next term of the series

1 + 3 + 9 + 27 + ...

• 54

• 81

• 162

• 92

Beth yw'r term coll? / What's the missing term?

4 + 8 + ... + 32

• 16

• 24

• 20

• 18

Beth yw'r gymhareb gyffredin? / What's the common ratio?

64 + 16 + 4 + ...

• 4

• -4

• 1/2

• 1/4

Beth yw'r gymhareb gyffredin? / What's the common ratio?

5 - 10 + 20 - 40 + ...

• 2

• -2

• 5

• -5

Beth yw pedwerydd term cyfres hefo term cyntaf 3 a chymhareb gyffredin 2?

What's the fourth term of a series with first term 3 and common ratio 2?

• 12

• 24

• 18

• 48

Beth yw cymhareb gyffredin y gyfres / What's the common ratio of the series

10,000 + 1000 + 100 + ...

• 10

• 1

• 0.1

• 0.01

Beth yw cymhareb gyffredin y gyfres / What's the common ratio of the series

5 - 15 + 45 - 135 + ...

• 5

• -5

• 3

• -3

Sawl term sydd yn y gyfres / How many terms in the series

1 + 2 + 4 + ... + 128

• 6

• 7

• 8

• 9