{"id":5366,"date":"2016-11-17T15:27:23","date_gmt":"2016-11-17T09:57:23","guid":{"rendered":"http:\/\/race4job.com\/blog\/?p=5366"},"modified":"2016-11-17T15:28:58","modified_gmt":"2016-11-17T09:58:58","slug":"mind-maths-4","status":"publish","type":"post","link":"https:\/\/www.race4job.com\/blog\/mind-maths-4\/","title":{"rendered":"Mind Maths"},"content":{"rendered":"<p><span style=\"color: #ff0000;\">FINDING CUBE OF NUMBERS<\/span><\/p>\n<p><span style=\"color: #ff0000;\">NUMBERS BETWEEN 10-20<\/span><br \/>\n<span style=\"color: #0000ff;\">Students should remember cubes of 10 numbers.<\/span><\/p>\n<p><span style=\"color: #000000;\">1<sup>3 <\/sup>\u00a0 = 1<\/span><br \/>\n<span style=\"color: #000000;\"> 2<sup>3 <\/sup> = 8<\/span><br \/>\n<span style=\"color: #000000;\"> 3<sup>3 <\/sup> = 27<\/span><br \/>\n<span style=\"color: #000000;\"> 4<sup>3 <\/sup> = 64<\/span><br \/>\n<span style=\"color: #000000;\"> 5<sup>3 <\/sup> = 125<\/span><br \/>\n<span style=\"color: #000000;\"> 6<sup>3 <\/sup> = 216<\/span><br \/>\n<span style=\"color: #000000;\"> 7<sup>3 <\/sup> = 343<\/span><br \/>\n<span style=\"color: #000000;\"> 8<sup>3 <\/sup> = 512<\/span><br \/>\n<span style=\"color: #000000;\"> 9<sup>3 <\/sup> = 729<\/span><br \/>\n<span style=\"color: #000000;\"> 10<sup>3 <\/sup> = 1000<\/span><\/p>\n<p><span style=\"color: #000000;\">We take an example and understand this method.<\/span><\/p>\n<p><span style=\"color: #ff0000;\">Let us find the cube of 13 &#8211;<\/span><\/p>\n<p><span style=\"color: #000000;\">First write two digits of 13 in the first 2 places<\/span><br \/>\n<span style=\"color: #000000;\"> Write square of 2nd digit (here 3) in the third place and cube of 2nd digit in the fourth place<\/span><br \/>\n<span style=\"color: #000000;\"> 1 \u00a0 \u00a0 \u00a0 \u00a03 \u00a0 \u00a0 \u00a0 \u00a09 \u00a0 \u00a0 \u00a0 27<\/span><br \/>\n<span style=\"color: #000000;\"> Double the middle numbers and add<\/span><br \/>\n<span style=\"color: #000000;\"> 1 \u00a0 \u00a0 \u00a0 \u00a03 \u00a0 \u00a0 \u00a0 \u00a09 \u00a0 \u00a0 \u00a0 \u00a027<\/span><br \/>\n<span style=\"color: #000000;\"> 6 \u00a0 \u00a0 \u00a0 18<\/span><br \/>\n<span style=\"color: #000000;\"> (1) \u00a0 \u00a0(2) \u00a0 \u00a0 (2)<\/span><br \/>\n<span style=\"color: #000000;\"> 2 \u00a0 \u00a0 \u00a0 \u00a01 \u00a0 \u00a0 \u00a0 \u00a09 \u00a0 \u00a0 \u00a0 \u00a07<\/span><br \/>\n<span style=\"color: #000000;\"> \u2234 13<sup>3 <\/sup> = 2197<\/span><\/p>\n<p><span style=\"color: #ff0000;\">Let us find the cube of 15 &#8211; <\/span><\/p>\n<p><span style=\"color: #000000;\">Square of 5 = 25; cube of 5 = 125<\/span><br \/>\n<span style=\"color: #000000;\"> 1 \u00a0 \u00a0 \u00a0 \u00a05 \u00a0 \u00a0 \u00a0 \u00a0 25 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0125<\/span><br \/>\n<span style=\"color: #000000;\"> Double the middle numbers and add<\/span><br \/>\n<span style=\"color: #000000;\"> 1 \u00a0 \u00a0 \u00a0 5 \u00a0 \u00a0 \u00a0 \u00a0 \u00a025 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 125<\/span><br \/>\n<span style=\"color: #000000;\"> 10 \u00a0 \u00a0 \u00a0 \u00a0 50<\/span><br \/>\n<span style=\"color: #000000;\"> (2) \u00a0 (8) \u00a0 \u00a0 \u00a0 (12)<\/span><br \/>\n<span style=\"color: #000000;\"> 3 \u00a0 \u00a0 \u00a03 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a07 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a05<\/span><br \/>\n<span style=\"color: #000000;\"> \u223415<sup>3 <\/sup> = 2197<\/span><\/p>\n<p><span style=\"color: #000000;\">Similarly,<\/span><br \/>\n<span style=\"color: #ff0000;\"> Cube of 18 &#8211;<\/span><br \/>\n<span style=\"color: #000000;\"> 1 \u00a0 \u00a0 \u00a0 \u00a08 \u00a0 \u00a0 \u00a0 \u00a064 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0512<\/span><br \/>\n<span style=\"color: #000000;\"> Double the middle numbers and add<\/span><br \/>\n<span style=\"color: #000000;\"> 1 \u00a0 \u00a0 \u00a0 \u00a0 8 \u00a0 \u00a0 \u00a0 64 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0512<\/span><br \/>\n<span style=\"color: #000000;\"> 16 \u00a0 \u00a0 128<\/span><br \/>\n<span style=\"color: #000000;\"> (4) \u00a0 \u00a0 (24) \u00a0 \u00a0(51)<\/span><br \/>\n<span style=\"color: #000000;\"> 5 \u00a0 \u00a0 \u00a0 \u00a0 8 \u00a0 \u00a0 \u00a0 \u00a0 3 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a02<\/span><br \/>\n<span style=\"color: #000000;\"> \u2234 18<sup>3 <\/sup> = 5832<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>FINDING CUBE OF NUMBERS NUMBERS BETWEEN 10-20 Students should remember cubes of 10 numbers. 13 \u00a0 = 1 23 = 8 33 = 27 43 = 64 53 = 125 63 = 216 73 = 343 83 = 512 93 = 729 103 = 1000 We take an example and understand this method. Let us [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5366","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/posts\/5366","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/comments?post=5366"}],"version-history":[{"count":1,"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/posts\/5366\/revisions"}],"predecessor-version":[{"id":5368,"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/posts\/5366\/revisions\/5368"}],"wp:attachment":[{"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/media?parent=5366"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/categories?post=5366"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/tags?post=5366"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}