9, 14, 19, □, 29
Answer and explanation
24
19 + 5 = 24
Subjects
Choose questions individually, practise online, or create a worksheet with matching answers. Counts include generated variants, not only authored originals.
24
19 + 5 = 24
20
15 + 5 = 20
16
14 + 2 = 16
Find the repeated difference between neighbouring terms.
Grades 1–3Rules, conditions and small examples in one printable reference.
Grades 1–2Rules, conditions and small examples in one printable reference.
Grades 3–3Practise improper integrals, series, gradients and multiple integrals, with explicit conditions and worked examples.
Develop matrix, vector-space and projection reasoning before using least squares.
Connect initial conditions, linear differential equations and numerical approximation with error and conditioning.
Work with conditional probability, normalization, densities and expectation.
Build epsilon proofs and distinguish pointwise convergence, uniform convergence and compactness.
Study groups, vector-space quotients and proof techniques with carefully scoped definitions.
Study complex analysis, residues, Fourier series, PDE boundary conditions and convexity through focused lessons.
Learn descriptive statistics, probability, sampling and inference with worked reasoning.