⌂
Leaderboards
n
×
11
n \times 11
n
×
11
n
×
25
n \times 25
n
×
25
n
101
n101
n
101
n
111
n111
n
111
n
%
x
n \% x
n
%
x
n
−
x
n - x
n
−
x
n
+
x
n + x
n
+
x
FOIL
\text{FOIL}
FOIL
SQUARES (10-41)
\text{SQUARES (10-41)}
SQUARES (10-41)
SQUARES (41-60)
\text{SQUARES (41-60)}
SQUARES (41-60)
Tens Trick
\text{Tens Trick}
Tens Trick
Sum of Arithmetic Series
\text{Sum of Arithmetic Series}
Sum of Arithmetic Series
Estimation
\text{Estimation}
Estimation
<
100
Multiplication
<100 \text{ Multiplication}
<
100
Multiplication
>
100
Multiplication
>100 \text{ Multiplication}
>
100
Multiplication
> / <
100
Multiplication
\text{> / < } 100 \text{ Multiplication}
> / <
100
Multiplication
Dec/Frac Conversion
\text{Dec/Frac Conversion}
Dec/Frac Conversion
Dec Addition/Subtraction
\text{Dec Addition/Subtraction}
Dec Addition/Subtraction
Roman Numerals
\text{Roman Numerals}
Roman Numerals
Cubes
\text{Cubes}
Cubes
GCD
\text{GCD}
GCD
LCM
\text{LCM}
LCM
Conversion into Base 10
\text{Conversion into Base 10}
Conversion into Base 10
Conversion from Base 10
\text{Conversion from Base 10}
Conversion from Base 10
Conversion of Base 2, 4, 8
\text{Conversion of Base 2, 4, 8}
Conversion of Base 2, 4, 8
Sum of Integral Divisors
\text{Sum of Integral Divisors}
Sum of Integral Divisors
Sum of Prime Divisors
\text{Sum of Prime Divisors}
Sum of Prime Divisors
x
90
,
x
99
,
x
900
,
x
990
\frac{x}{90}, \frac{x}{99}, \frac{x}{900}, \frac{x}{990}
90
x
,
99
x
,
900
x
,
990
x
Triangular Numbers
\text{Triangular Numbers}
Triangular Numbers
Pentagonal Numbers
\text{Pentagonal Numbers}
Pentagonal Numbers
Hexagonal Numbers
\text{Hexagonal Numbers}
Hexagonal Numbers
x
2
+
(
2
x
)
2
x^2 + (2x)^2
x
2
+
(
2
x
)
2
x
2
+
(
3
x
)
2
x^2 + (3x)^2
x
2
+
(
3
x
)
2
Complex Number Multiplication
\text{Complex Number Multiplication}
Complex Number Multiplication
Unit Conversions
\text{Unit Conversions}
Unit Conversions
x
2
+
(
x
+
1
)
2
x^2 + (x+1)^2
x
2
+
(
x
+
1
)
2
a
b
+
b
a
\frac{a}{b} + \frac{b}{a}
b
a
+
a
b
#
of distinct diagonals in a polygon
\# \text{ of distinct diagonals in a polygon}
#
of distinct diagonals in a polygon
Sum of
n
Cubes
\text{Sum of } n \text{ Cubes}
Sum of
n
Cubes
Alternating Sum of
n
Sqaures
\text{Alternating Sum of } n \text{ Sqaures}
Alternating Sum of
n
Sqaures
Mean/Median
\text{Mean/Median}
Mean/Median
Geometric Mean
\text{Geometric Mean}
Geometric Mean
Harmonic Mean
\text{Harmonic Mean}
Harmonic Mean
Estimating Square/Cube Roots
\text{Estimating Square/Cube Roots}
Estimating Square/Cube Roots
x
100
of
y
\frac{x}{100} \text{ of } y
100
x
of
y
a
×
b
c
\frac{a \times b}{c}
c
a
×
b
(
a
+
b
)
×
(
a
−
b
)
(a+b) \times (a-b)
(
a
+
b
)
×
(
a
−
b
)
Fibonacci Series
\text{Fibonacci Series}
Fibonacci Series
3 digit FOIL
\text{3 digit FOIL}
3 digit FOIL
3-digit Squares
\text{3-digit Squares}
3-digit Squares
3-digit Cubes
\text{3-digit Cubes}
3-digit Cubes
x
3
−
y
3
x
−
y
\frac{x^3-y^3}{x-y}
x
−
y
x
3
−
y
3