This kid is solving complex maths problems faster than most adults can read them. The technique is called Mental Abacus. Children train until they can visualize a full abacus in their head and calculate using finger movements that represent invisible beads. At competition level, they can add fifteen three-digit numbers in under two seconds. No calculator. Just hands and a mental image. (via: @omonillo_ziyo_beu/ig) #RoadTo19M #Pubity