{"id":4780,"date":"2016-10-18T18:46:08","date_gmt":"2016-10-18T13:16:08","guid":{"rendered":"http:\/\/race4job.com\/blog\/?p=4780"},"modified":"2016-10-18T18:46:08","modified_gmt":"2016-10-18T13:16:08","slug":"mind-maths-3","status":"publish","type":"post","link":"https:\/\/www.race4job.com\/blog\/mind-maths-3\/","title":{"rendered":"Mind Maths"},"content":{"rendered":"

FINDING CUBE OF NUMBERS<\/strong><\/span><\/h3>\n

Students should remember cubes of 10 numbers.<\/span>
\n13 = 1
\n23 = 8
\n33 = 27
\n43 = 64
\n53 = 125
\n63 = 216
\n73 = 343
\n83 = 512
\n93 = 729
\n103 = 1000
\nWe take an example and understand this method.<\/span><\/p>\n

Let us find the cube of 13 –<\/span>First write two digits of 13 in the first 2 places\u00a0Write square of 2nd digit (here 3) in the third place\u00a0<\/span>and cube of 2nd digit in the fourth place<\/span>
\n1 3 9 27
\nDouble the middle numbers and add<\/span>
\n1 3 9 27
\n6 18
\n(1) (2) (2)
\n2 1 9 7
\n\u2234 133 = 2197
\nWe see another example<\/span><\/p>\n

Let us find the cube of 15 –\u00a0Square of 5 = 25; cube of 5 = 125<\/span>
\n1 5 25 125
\nDouble the middle numbers and add<\/span>
\n1 5 25 125
\n10 50
\n(2) (8) (12)
\n3 3 7 5
\n\u2234 153 = 2197
\nSimilarly,Cube of 18 -1 8 64 512 \u00a0Double the middle numbers and add<\/span><\/p>\n

1 8 64 512
\n16 128
\n(4) (24) (51)
\n5 8 3 2
\n\u2234 183 = 5832
\nTRY THESE<\/span>
\n1.<\/span> 143 2<\/span>. 123 \u00a03.<\/span> 173 4.<\/span> 163 \u00a05.<\/span> 193
\nKEY<\/span>
\n1.<\/span> 2744 \u00a0 \u00a02.<\/span> 1728 \u00a0 \u00a03.<\/span> 4913 \u00a0 4.<\/span> 4096 \u00a0 \u00a05.<\/span> 6859<\/p>\n","protected":false},"excerpt":{"rendered":"

FINDING CUBE OF NUMBERS Students should remember cubes of 10 numbers. 13 = 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 find the cube of […]<\/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-4780","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/posts\/4780","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=4780"}],"version-history":[{"count":1,"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/posts\/4780\/revisions"}],"predecessor-version":[{"id":4781,"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/posts\/4780\/revisions\/4781"}],"wp:attachment":[{"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/media?parent=4780"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/categories?post=4780"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.race4job.com\/blog\/wp-json\/wp\/v2\/tags?post=4780"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}