Abacus is an ancient calculating tool that can be used for various mathematical calculations like addition, subtraction, multiplication, division or even for basic counting. The design of this tool ...

FORT LEE — For 10 seconds, a series of 50 random three-digit numbers flashed on the screen. After another second, abacus master Jeonghee Lee announced she'd finished the mental addition, correctly ...

Children sat on the floor, curiously, facing a large abacus with yellow beads. When asked ‘do you find maths easy?, the reply was a faint yes. The question was repeated and this time, there was pin ...