WebApr 5, 2024 · A related trick is to take any three-digit number. Multiply it by 7, 11, and 13. The result will be a six-digit number that repeats the three-digit number. Example: 456 becomes 456456. 05 of 10 The 11 Rule This is a quick way to multiply two-digit numbers by 11 in your head. Separate the two digits in your mind. Add the two digits together. WebApr 12, 2013 · Consultingrs: Make no mistakes - watch out for units, as they are often there to purposely trick you (i.e., is it in $M or $B?, is it 100M lbs or just individual lbs?) …
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