The fastest time to mentally add 200 four-digit numbers is 1 min 9.68 sec, and was achieved by Aaryan Shukla (India) in Dubai, UAE, on 6 December 2024. Aaryan (the 'human calculator') is a serial ...
One of Aaryan Shukla's world records is for mentally adding 100 four-digit numbers in 30.9 seconds. Reading time 2 minutes Remember when your teachers used to say that mental math is important because ...
I learned about a pastime game that everyone has apparently been playing for a long time.It is called MAKE10 (Make Ten).It seems many people know it by the name 'Four Arithmetic Operations Game,' but ...
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