FoxSumKids
Progressions: math practice, grade 9
Practise “Progressions” online for free. Five right answers in a row make the tasks harder, two mistakes in a row make them easier. Right answers earn coins for games.
Example problems
These are only examples: the practice makes new tasks every time.
Which number comes next in the arithmetic progression?
17, 23, 29, 35, ?
Answer
41
a₁ = 5, d = 4
a₁₂ = ?Answer
49
a₁ = 11, d = 4
S₂₀ = ?Answer
980
a₁ = 12, d = 4
S₁₅ = ?Answer
600
b₁ = 5, q = 2
b₆ = ?Answer
160
b₁ = 5, q = 3
S₄ = ?Answer
200