perplexus.info :: Just Math : Only p&p Quickie

Only p&p Quickie (Posted on 2025-04-09)

Without any calculator or log tables, find the value of 5¹¹ - 6

No Solution Yet Submitted by K Sengupta

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my way - direct computation

Comment 4 of 4 |

it says its a quickie so I'll see how quick I can do it. Since 5 = 10/2 I can easily halve the number but not move the decimal point each time.

Here goes:

125

625

3125

15625

78125

390625

1953125

9765625

48828125 - 6

48828119

2 minutes, 24.02 seconds.

Posted by Jer on 2025-04-11 10:59:12

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