I am a student of class 10 and I am a physics and mathematics enthusiast. But I find the problems given in my textbook very very easy. On asking, my teacher recommended me the Pearson IIT Foundation Course saying that it has some really tough questions. But again, while all my classmates struggled through it, it was a cakewalk for me. I love tough problems, the more tough the more is the FUN provided that the questions are not much out of the scope of my syllabus. So ARE THERE ANY TEXTBOOKS HAVING MIND-BOGGLING QUESTIONS (NUMERICAL PROBLEMS)?
The scope of my syllabus is:
PHYSICS:
1. Motion in one dimension
2. Force
3. Simple Machines (Including block and tackle pulley system)
4. Refraction of light at Plane surfaces
5. Refraction through a lens
6. Spectrum
7. Sound (Including Forced vibrations and resonance)
8. Current Electricity (not including Kirchoff's law)
9. Electrical power and House hold circuits
10. Electro-magnetism
11. Heat and principle of calorimetry
12. Thermionic emissions and radioactivity
MATHEMATICS:
Algebra:
1. Linear inequalities in one variable
2. Quadratic Equations
3. Factorization (including Factor and Remainder theorem)
4. HCF and LCM of Polynomials by factorization
5. Ratio and proportion
6. Matrices
7. Logarithms
Coordinate geometry:
1. Refection (Reflection of a point about a line and reflection of a point about origin)
2. Distance and Section Formula
3. Equation of a straight line
Geometry:
1. Symmetry
2. Triangles (including inequalities)
3. Similarity
4. Loci
5. Circle
6. Properties of arcs and chords
7. Cyclic properties of a circle
8. Properties of tangents
9. Construction
Mensuration:
1. Area and perimeter of a circle
2. Three-Dimensional Solids
Trigonometry:
1. Trigonometry Identities
2. Trigonometric Ratios of Complementary angles
3. Heights and Distances
Statistics and Probability:
1. Graphical Representation
2. Measures of Central Tendency
3. Probability

