1. ALGEBRA

2. Felicia is a primary 6 student.
She is 10 years old.
How old will Felicia be in 1 years time?
Felicia will be 11 years old in 1 years time.
10 + 1
How old will Felicia be in 2 years time?
Felicia will be 12 years old in 2 years time.
10 + 2

3. Jojo is a new student in primary 6.
The class doesn’t know how old he is.
Let say, Jojo is k years old.
k represents Jojo’s age.
k = Jojo’s age

4. How old will Jojo be in 1 years time?
k + 1
Jojo will be (k + 1) years old in 1 years time.
How old will Jojo be in 2 years time?
k + 2
Jojo will be (k + 2) years old in 2 years time.

5. How old was Jojo 1 year ago?
k – 1
Jojo was (k – 1) years old 1 year ago.
How old was Jojo 2 year ago?
k – 2
Jojo was (k – 2) years old 2 year ago.

6. Jojo's Age
Now k 10
Next 1 year
k + 1
10 + 1
Next 2 year
k + 2
10 + 2
Next 3 year
k + 3
10 + 3
Next 4 year
k + 4
10 + 4
1 year ago
k - 1
10 - 1
2 year ago
k - 2
10 - 2
3 year ago
k - 3
10 - 3
4 year ago
k - 4
10 - 4