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Category: Mensuration

8-A-number-can-be-expressed-as-a-terminating-decimal-if-the-denominator-has-factors-a-2-3-or-5-b-2-or-3-c-3-or-5-

Question Number 157724 by Ppmaurya last updated on 27/Oct/21 $$\mathrm{8}.\:\:\:\:\:\:\:\:\:\:\:\:\:\:\mathrm{A}\:\mathrm{number}\:\mathrm{can}\:\mathrm{be}\:\mathrm{expressed}\:\mathrm{as}\:\mathrm{a}\:\mathrm{terminating}\:\mathrm{decimal},\mathrm{if}\:\mathrm{the}\:\mathrm{denominator}\:\mathrm{has}\:\mathrm{factors}\:: \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\left(\mathrm{a}\right)\:\mathrm{2},\mathrm{3}\:\mathrm{or}\:\mathrm{5}\:\:\:\:\:\:\:\: \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\left(\mathrm{b}\right)\:\mathrm{2}\:\mathrm{or}\:\mathrm{3} \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\left(\mathrm{c}\right)\:\mathrm{3}\:\mathrm{or}\:\mathrm{5} \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\left(\mathrm{d}\right)\:\mathrm{2}\:\mathrm{or}\:\mathrm{5} \\ $$$$\:\mathrm{9}.\:\:\:\:\:\:\:\:\:\:\mathrm{Given}\:\mathrm{that}\::\:\mathrm{HCF}\:\mathrm{of}\:\mathrm{2520}\:\mathrm{and}\:\mathrm{6600}=\:\mathrm{120},\:\mathrm{LCM}\:\mathrm{of}\:\mathrm{2520}\:\mathrm{and}\:\mathrm{6600}=\:\mathrm{252}×{k},\:\mathrm{then}\:\mathrm{the}\:\mathrm{value}\:\mathrm{of}\:{k}\:\mathrm{is}\:: \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\left(\mathrm{a}\right)\:\mathrm{165} \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\left(\mathrm{b}\right)\:\mathrm{1625} \\…

Question-92170

Question Number 92170 by jagoll last updated on 05/May/20 Commented by jagoll last updated on 05/May/20 is teaching my child �������� Commented by jagoll last updated on 05/May/20 $$\mathrm{when}\:\mathrm{does}\:\mathrm{this}\:\mathrm{covid}\:\mathrm{19}\:\mathrm{pandemic}\:…

Question-91836

Question Number 91836 by  M±th+et+s last updated on 03/May/20 Commented by  M±th+et+s last updated on 03/May/20 $${let}\:{A}\:{B}\:{C}\:{D}\:{be}\:{four}\:{points}\:{on}\:{a}\:{circle} \\ $$$${let}\:{four}\:{more}\:{cirvces}\:{pass}\:{through}\: \\ $$$${AB}\:,\:{BC}\:,\:{CD}\:,\:{DA}\:{Respectively}, \\ $$$${meeting}\:{infurther}\:{points}\:{P},{Q},{R},{S}. \\ $$$${show}\:{that}\:{P},{Q},{R}\:{and}\:{S}\:{are}\:{consyclic}.…

Question-26205

Question Number 26205 by ajfour last updated on 22/Dec/17 Commented by ajfour last updated on 22/Dec/17 $${Find}\:{the}\:{area}\:{of}\:{the}\:{uncoloured} \\ $$$${region}\:{inside}\:{triangle}\:{in}\:{terms} \\ $$$${of}\:{radii}\:{a}\:,\:{and}\:{b}\:{of}\:{the}\:{lower} \\ $$$${circles}. \\ $$…