Math With Amar · Guided practice
10,000 ways to practice.
One idea at a time.
Each chapter gives you a distinct mathematical scenario: one question to attempt, a hint, a worked solution, and an animated example you can control.
10,000 questions · 10,000 animated scenarios · 14 study levels

Choose a starting point
Practice at your level.
Grade labels are starting points; school sequences vary. Advanced chapters assume the prerequisites listed on their pages.
Attempt · Explain · Animate
Grade 11 practice chapters
121–140 of 600 matching chapters · Page 7 of 30
Clear filtersGrade 11 · Chapter 121
Exponential calibration · Initial value a=1; Exponential rate b=-0.2
Evaluate at t=2.4 time units. Find the signal value, tangent slope, and multiplicative change from f(0). Givens: Initial value a=1; Exponential rate b=-0.2.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 122
Geometric sums · First term a=3; Ratio r=-0.3
Include the first n=8 terms, from ar⁰ through ar⁷. Calculate the finite sum, last included term, and infinite-series limit. Givens: First term a=3; Ratio r=-0.3.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 123
Complex polar form · Modulus r=1; Final angle (degrees)=-135
Evaluate at the signed angle θ=-81° (three fifths of that final angle). Find its real and imaginary components and verify its modulus. Givens: Modulus r=1; Final angle (degrees)=-135.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 124
Triangle area and angle · Second side b=2.5; Included angle (degrees)=75
Use the included angle C=51°. Find the area and the side opposite C. Givens: Second side b=2.5; Included angle (degrees)=75.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 125
Quadratic sequences · Quadratic coefficient a=0; Linear coefficient b=-0.5
Use index n=6. Calculate u₆, the forward first difference u₇−u₆, and the second difference u₈−2u₇+u₆. Givens: Quadratic coefficient a=0; Linear coefficient b=-0.5.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 126
Polynomial roots · First root a=-2.5; Second root b=-2
Evaluate at x=0.8. Find the function value, tangent slope, and vertical line of symmetry. Givens: First root a=-2.5; Second root b=-2.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 127
Logarithms and domains · Domain boundary a=0.5; Logarithm base b=4.5
Use x=3.58; the logarithm argument is exactly 3.08. State the domain, evaluate the logarithm, and recover the argument by exponentiation. Givens: Domain boundary a=0.5; Logarithm base b=4.5.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 128
Exponential calibration · Initial value a=1.5; Exponential rate b=-0.1
Evaluate at t=2.4 time units. Find the signal value, tangent slope, and multiplicative change from f(0). Givens: Initial value a=1.5; Exponential rate b=-0.1.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 129
Geometric sums · First term a=3.5; Ratio r=-0.2
Include the first n=8 terms, from ar⁰ through ar⁷. Calculate the finite sum, last included term, and infinite-series limit. Givens: First term a=3.5; Ratio r=-0.2.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 130
Complex polar form · Modulus r=1.5; Final angle (degrees)=-120
Evaluate at the signed angle θ=-72° (three fifths of that final angle). Find its real and imaginary components and verify its modulus. Givens: Modulus r=1.5; Final angle (degrees)=-120.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 131
Quadratic sequences · Quadratic coefficient a=0.5; Linear coefficient b=0
Use index n=6. Calculate u₆, the forward first difference u₇−u₆, and the second difference u₈−2u₇+u₆. Givens: Quadratic coefficient a=0.5; Linear coefficient b=0.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 132
Rescaling data · Scale a=1; Shift b=0.5
Use the completed transformation, at the end of the animation. Find the transformed mean, population variance, and population standard deviation. Givens: Scale a=1; Shift b=0.5.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 133
Polynomial roots · First root a=-2; Second root b=-1.5
Evaluate at x=0.8. Find the function value, tangent slope, and vertical line of symmetry. Givens: First root a=-2; Second root b=-1.5.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 134
Rational functions · Numerator a=4; Pole location b=2
Evaluate at x=4.5, exactly 2.5 units to the right of the pole. Find the value, derivative, and excluded input. Givens: Numerator a=4; Pole location b=2.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 135
Logarithms and domains · Domain boundary a=1; Logarithm base b=5
Use x=4.08; the logarithm argument is exactly 3.08. State the domain, evaluate the logarithm, and recover the argument by exponentiation. Givens: Domain boundary a=1; Logarithm base b=5.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 136
Geometric sums · First term a=4; Ratio r=-0.1
Include the first n=8 terms, from ar⁰ through ar⁷. Calculate the finite sum, last included term, and infinite-series limit. Givens: First term a=4; Ratio r=-0.1.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 137
Complex polar form · Modulus r=2; Final angle (degrees)=-105
Evaluate at the signed angle θ=-63° (three fifths of that final angle). Find its real and imaginary components and verify its modulus. Givens: Modulus r=2; Final angle (degrees)=-105.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 138
Trigonometric periods · Amplitude A=2; Angular frequency k=3
Evaluate at x=6π/5 radians, keeping π exact during calculation. Find the signal value, derivative with respect to x, and period. Givens: Amplitude A=2; Angular frequency k=3.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 139
Triangle area and angle · Second side b=3.5; Included angle (degrees)=105
Use the included angle C=69°. Find the area and the side opposite C. Givens: Second side b=3.5; Included angle (degrees)=105.
Question · Worked solution · Animated example
Open practice chapterGrade 11 · Chapter 140
Quadratic sequences · Quadratic coefficient a=1; Linear coefficient b=0.5
Use index n=6. Calculate u₆, the forward first difference u₇−u₆, and the second difference u₈−2u₇+u₆. Givens: Quadratic coefficient a=1; Linear coefficient b=0.5.
Question · Worked solution · Animated example
Open practice chapter