Tricksy1.3 - App Store

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 x 5
. Two digit number x 11: ab x 11; a + b < 10
. Two digit number x 11: ab x 11; a + b ≥ 10
. Any number x 9
. The repeated #1s x the repeated #9s having the same # of digits: 111..1 x 999..9
. The repeated #1s x 12: 111..1 x 12 ( Locked )
. The repeated #1s x 13: 111..1 x 13 ( Locked )
. The repeated #1s x 14: 111..1 x 14 ( Locked )
. The repeated #1s x 15: 111..1 x 15 ( Locked )
. The repeated #1s x 16: 111..1 x 16 ( Locked )
. The repeated #1s x 17: 111..1 x 17 ( Locked )
. The repeated #1s x 18: 111..1 x 18 ( Locked )
. The repeated #1s x 19: 111..1 x 19 ( Locked )
. Consecutive decade ending in 5: a5 x b5; b = a + 1 ( Locked )
. Two 2-digit numbers with same 10s digit: ab x ac; b + c = 10 ( Locked )
. Two 2-digit numbers with same 10s digit: ab x ac; b + c ≠ 10 ( Locked )
. Two 2-digit numbers with same 1s digit: ab x cb; a + c = 10 ( Locked )
. Two 2-digit numbers with same 1s digit: ab x 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% (21/2%) 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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Version History • iOS 12 support 1.3 11/12/2018 • Minor improvements 1.2.2 07/17/2017 • iPad Pro support
• Minor improvements 1.2.1 11/12/2015 • iOS 9 support
• Minor improvements 1.2 10/12/2015 • Minor improvements.
• Icon improvement.
• Added a new tool: metric prefixes (For pro users). 1.1 04/07/2015 1.0 02/16/2015