MATH COUNTS QUESTION #11

Algebra Level 1

Evaluate the sum of 1 + 22 + 333 + 4444


The answer is 4800.

Eric Zhu by Eric Zhu , 15, USA

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1 solution

Krishna Karthik
Nov 6, 2018

everyone got this right, so there is no point explaining how to do it, but the fastest way to do this is to visualise a pattern. 4+3=7 so 7s fill the rest of the decimal places, then 7+2= 9 so 9s fill the tenth and units places and + 1 is obviously 4800

1 Helpful 0 Interesting 0 Brilliant 0 Confused

buy a buzzer and time yourself. the max for this question is 1 second and you do not have paper

Eric Zhu - 2 years, 7 months ago

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I clicked on the answering box, which took me about 0.8 seconds, and then typing the answer took me about 0.5 . So, in total I took just over a second.

Krishna Karthik - 2 years, 7 months ago

Have you been in any mathcounts? I live in Australia and hear they are very competitive.

Krishna Karthik - 2 years, 7 months ago

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