Tricksy

Tricksy is a universal app that allows you to solve many math operations in a simple way, by applying untraditional techniques.

        This app includes more than 60 lessons classified into these domains: Addition,  subtraction, multiplication, division, percentage and power.

        These lessons are presented in levels, arranged from the easiest lesson to the most difficult one. Each of these lessons is explained in a simple and clear way; using steps supported by examples.

        Besides the lessons, tricksy includes some useful tools for calculation, in which students can benefit, and may apply them during their school domain.

~The included tricks are:

▸ Addition:
   • Adding two-digit numbers like ab + ba
   • Adding 2 fractions like 1/a + 1/b
   • Adding a sequence of odd numbers beginning by 1: 1 + 3 + 5 + … + 2n-1
   • Adding a sequence of even numbers beginning by 2: 2 + 4 + 6 + … + 2n
   • Adding a sequence from 1 to any number and back to 1 again: 1 + 2 + 3 +…+ X +…+ 3 + 2 +1
   • Adding a sequence of doubles: X + 2⋅X + 2²⋅X + 2³⋅X + ... + 2ⁿ⋅X ( Locked )
   • ...

▸ Subtraction:
   • Subtracting two-digit numbers like ab − ba
   • Subtracting 2 fractions like 1/a − 1/b
   • Subtracting 2 fractions like c/a − c/b
   • Subtracting 2 fractions like (a − 1)/a  −  (b − 1)/b
   • Subtracting three-digit numbers like abc − cba ( Locked )
   • Subtracting the squares of two numbers differing by 2: X² − (X−2)² ( Locked )
   • ...

▸ Multiplication:
   • Any number × 5
   • Two digit number × 11:  ab × 11; a + b < 10
   • Two digit number × 11:  ab × 11; a + b ≥ 10
   • Any number × 9
   • The repeated #1s × the repeated #9s having the same # of digits: 111..1 × 999..9
   • The repeated #1s × 12:  111..1 × 12 ( Locked )
   • The repeated #1s × 13:  111..1 × 13 ( Locked )
   • The repeated #1s × 14:  111..1 × 14 ( Locked )
   • The repeated #1s × 15:  111..1 × 15 ( Locked )
   • The repeated #1s × 16:  111..1 × 16 ( Locked )
   • The repeated #1s × 17:  111..1 × 17 ( Locked )
   • The repeated #1s × 18:  111..1 × 18 ( Locked )
   • The repeated #1s × 19:  111..1 × 19 ( Locked )
   • Consecutive decade ending in 5: a5 × b5; b = a + 1 ( Locked )
   • Two 2-digit numbers with same 10s digit: ab × ac; b + c = 10 ( Locked )
   • Two 2-digit numbers with same 10s digit: ab × ac; b + c ≠ 10 ( Locked )
   • Two 2-digit numbers with same 1s digit: ab × cb; a + c = 10 ( Locked )
   • Two 2-digit numbers with same 1s digit: ab × cb; a + c ≠ 10 ( Locked )

▸ Division:
   • Any number ÷ 5
   • Any number ÷ 50
   • Any number ÷ 25
   • Any number ÷ 250
   • Any number ÷ 125
   • Repeating 3-digit number ÷ 37: aaa ÷ 37
   • Any number ÷ 40 ( Locked )
   • Any number ÷ 15 ( Locked )
   • Any number ÷ 35 ( Locked )

▸ Percentage:
   • 50% of a number
   • 25% of a number
   • 20% of a number
   • 33.33...% (33⅓%) of a number
   • 5% of a number ( Locked )
   • 2.5% (2½%) of a number ( Locked )
   • 40% of a number ( Locked )
   • 60% of a number ( Locked )
   • 70% of a number ( Locked )
   • 75% of a number ( Locked )
   • 45% of a number ( Locked )
   • 15% of a number ( Locked )
   • ...

▸ Power:
   • Number made up of 1s: (111..1)²   ; number of digits  < 10 
   • Number made up of 3s: (333..3)² ( Locked )
   • Number made up of 6s: (666..6)²   ; 1 < number of digits ( Locked )  
   • Number made up of 9s: (999..9)²   ; 1 < number of digits ( Locked )  
   • Two digit number beginning with 5: (5a)² ( Locked )
   • Two digit number ending with 5: (a5)² ( Locked )
    

        Challenge your brain to think efficiently while having fun with our smart math tricks !
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