01 Jan 2026

Image: unsplash.com [{ "selector": ".drfnp-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "1", "visibility" :"visible"} ] }, { "selector": ".qsmms-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "transform": "translateY(calc(600px - 512px))", "opacity": "1", "visibility" :"visible"}, {"offset": 1, "transform": "translateY(0)", "opacity": "1", "visibility" :"visible"} ] }]

Math isn't just about formulas- smart tricks can save time and effort

Image: unsplash.com [{ "selector": ".sldqm-a", "duration": "1000ms", "fill": "forwards", "delay": "1000ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "80%", "visibility" :"visible"} ] }, { "selector": ".okdbb-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "1", "visibility" :"visible"} ] }, { "selector": ".gcbfu-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "transform": "translateY(calc(600px - 433px))", "opacity": "1", "visibility" :"visible"}, {"offset": 1, "transform": "translateY(0)", "opacity": "1", "visibility" :"visible"} ] }]

These simple math shortcuts will make numbers feel easier than ever

Image: pixabay.com [{ "selector": ".qajuc-a", "duration": "1000ms", "fill": "forwards", "delay": "1000ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "80%", "visibility" :"visible"} ] }, { "selector": ".bdsgg-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "1", "visibility" :"visible"} ] }, { "selector": ".dmkdx-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "transform": "translateY(calc(600px - 454px))", "opacity": "1", "visibility" :"visible"}, {"offset": 1, "transform": "translateY(0)", "opacity": "1", "visibility" :"visible"} ] }]

Multiply any number by 9 and add its digits - the answer will always add up to 9

Image: pixabay.com [{ "selector": ".irotc-a", "duration": "1000ms", "fill": "forwards", "delay": "1000ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "80%", "visibility" :"visible"} ] }, { "selector": ".wmlwa-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "transform": "translateY(calc(600px - 449px))", "opacity": "1", "visibility" :"visible"}, {"offset": 1, "transform": "translateY(0)", "opacity": "1", "visibility" :"visible"} ] }, { "selector": ".cgwns-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "1", "visibility" :"visible"} ] }]

To multiply by 11, add the digits and place the sum in between them

Image: unsplash.com [{ "selector": ".adiff-a", "duration": "1000ms", "fill": "forwards", "delay": "1000ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "80%", "visibility" :"visible"} ] }, { "selector": ".dorwt-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "transform": "translateY(calc(600px - 455px))", "opacity": "1", "visibility" :"visible"}, {"offset": 1, "transform": "translateY(0)", "opacity": "1", "visibility" :"visible"} ] }, { "selector": ".exnkg-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "1", "visibility" :"visible"} ] }]

Finding 10% of a number is easy - just move the decimal one place left

Image: unsplash.com [{ "selector": ".nmcaf-a", "duration": "1000ms", "fill": "forwards", "delay": "1000ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "80%", "visibility" :"visible"} ] }, { "selector": ".uokbp-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "transform": "translateY(calc(600px - 489px))", "opacity": "1", "visibility" :"visible"}, {"offset": 1, "transform": "translateY(0)", "opacity": "1", "visibility" :"visible"} ] }, { "selector": ".nzfga-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "1", "visibility" :"visible"} ] }]

To square numbers ending in 5, multiply the first digit by the next number and add 25

Image: unsplash.com [{ "selector": ".bsrkf-a", "duration": "1000ms", "fill": "forwards", "delay": "1000ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "80%", "visibility" :"visible"} ] }, { "selector": ".azjrs-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "transform": "translateY(calc(600px - 469px))", "opacity": "1", "visibility" :"visible"}, {"offset": 1, "transform": "translateY(0)", "opacity": "1", "visibility" :"visible"} ] }, { "selector": ".gtmsf-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "1", "visibility" :"visible"} ] }]

Any number multiplied by zero is zero, but division by zero is not possible

Image: unsplash.com [{ "selector": ".bfiub-a", "duration": "1000ms", "fill": "forwards", "delay": "1000ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "80%", "visibility" :"visible"} ] }, { "selector": ".kajuq-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "transform": "translateY(calc(600px - 469px))", "opacity": "1", "visibility" :"visible"}, {"offset": 1, "transform": "translateY(0)", "opacity": "1", "visibility" :"visible"} ] }, { "selector": ".bzckc-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "1", "visibility" :"visible"} ] }]

To divide a number by 5, multiply it by 2 and move the decimal one place lef

Image: unsplash.com [{ "selector": ".rktkm-a", "duration": "1000ms", "fill": "forwards", "delay": "1000ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "80%", "visibility" :"visible"} ] }, { "selector": ".dwcxf-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "transform": "translateY(calc(600px - 469px))", "opacity": "1", "visibility" :"visible"}, {"offset": 1, "transform": "translateY(0)", "opacity": "1", "visibility" :"visible"} ] }, { "selector": ".jwsfj-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "1", "visibility" :"visible"} ] }]

The sum of the angles of any triangle is always 180 degrees.

Image: unsplash.com [{ "selector": ".qlsec-a", "duration": "1000ms", "fill": "forwards", "delay": "1000ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "80%", "visibility" :"visible"} ] }, { "selector": ".pmwrz-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "transform": "translateY(calc(600px - 469px))", "opacity": "1", "visibility" :"visible"}, {"offset": 1, "transform": "translateY(0)", "opacity": "1", "visibility" :"visible"} ] }, { "selector": ".cwxpx-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "1", "visibility" :"visible"} ] }]

A number is divisible by 3 if the sum of its digits is divisible by 3

Image: unsplash.com [{ "selector": ".kejac-a", "duration": "1000ms", "fill": "forwards", "delay": "1000ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "80%", "visibility" :"visible"} ] }, { "selector": ".cporf-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "transform": "translateY(calc(600px - 469px))", "opacity": "1", "visibility" :"visible"}, {"offset": 1, "transform": "translateY(0)", "opacity": "1", "visibility" :"visible"} ] }, { "selector": ".moijn-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "1", "visibility" :"visible"} ] }]

Any number raised to the power of zero is always equal to one

Image: unsplash.com [{ "selector": ".fsiab-a", "duration": "1000ms", "fill": "forwards", "delay": "1000ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "80%", "visibility" :"visible"} ] }, { "selector": ".uuoaj-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "transform": "translateY(calc(600px - 469px))", "opacity": "1", "visibility" :"visible"}, {"offset": 1, "transform": "translateY(0)", "opacity": "1", "visibility" :"visible"} ] }, { "selector": ".zkwne-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "1", "visibility" :"visible"} ] }]

Math becomes easy when you know the right tricks to use

Image: unsplash.com [{ "selector": ".gljji-a", "duration": "1000ms", "fill": "forwards", "delay": "1000ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "80%", "visibility" :"visible"} ] }, { "selector": ".tgzim-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "transform": "translateY(calc(600px - 469px))", "opacity": "1", "visibility" :"visible"}, {"offset": 1, "transform": "translateY(0)", "opacity": "1", "visibility" :"visible"} ] }, { "selector": ".fwqap-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "1", "visibility" :"visible"} ] }]

Check More Stories

Image: unsplash.com [{ "selector": ".owpaq-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "1", "visibility" :"visible"} ] }, { "selector": ".zgpaf-a", "duration": "1000ms", "fill": "forwards", "delay": "0ms", "keyframes": [ {"offset": 0, "opacity": 0, "visibility" :"visible"}, {"offset": 1, "opacity": "1", "visibility" :"visible"} ] }] ndtv.com