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Asked by vikasg13.hardware | 23 Jun, 2018, 05:36: PM
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begin mathsize 16px style straight E left parenthesis 1 right parenthesis plus straight E left parenthesis 2 right parenthesis plus straight E left parenthesis 3 right parenthesis plus..... plus straight E left parenthesis 100 right parenthesis case space 1 even space numbers space as space unit space digits sum space till space 10 space equals space 2 plus 4 plus 6 plus 8 equals 20 Sum left parenthesis 20 right parenthesis space will space occur space 10 space times space in space total space per space unit space digit so space from space 1 space to space 100 comma space 20 cross times 10 equals 200 space times space case space 2 even space number space as space 10 apostrophe straight s space digit 20 space to space 29 equals 10 space times 40 space to space 49 equals 10 space times similarly space for space 6 space and space 8 sum space of space even space numbers space on space ten apostrophe straight s space digit equals 20 plus 40 plus 60 plus 80 equals 200 straight E left parenthesis 1 right parenthesis plus straight E left parenthesis 2 right parenthesis plus...... plus straight E left parenthesis 100 right parenthesis equals 400 end style
Answered by Arun | 27 Jun, 2018, 11:07: AM

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