The average mass of a class of boys is 65kg. If Tim, who weighs 85kg joins the group, the new average mass of the group will become 60kg. Find the total number of boys in the class.


Explanation and solutions: https://owlsensei.com/2020/10/04/p5-math-average-with-unknown-quantity/

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]]>https://forum.kiasuparents.com/topic/96917/owl-sensei-math-guideRSS for NodeThu, 23 Apr 2026 14:08:41 GMTSun, 04 Oct 2020 07:41:47 GMT60The average number of sweets Paul and his 5 siblings have is 30. If his 5 siblings have an average of 24 sweets each. How many sweets does Paul have?


https://owlsensei.com/2020/09/28/p5-math-average/

Explanation and solutions: https://owlsensei.com/2020/08/15/p5-mat ... unchanged/

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]]>https://forum.kiasuparents.com/post/1996760https://forum.kiasuparents.com/post/1996760Wed, 30 Sep 2020 13:51:06 GMTThe ratio of the number of apples to the number of bananas in a basket was 3:2. After Tom ate 20 apples, the ratio became 1:4. How many apples and banana are there altogether in the end?


Explanation and solutions: https://owlsensei.com/2020/08/15/p5-math-ratio-external-unchanged/

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]]>https://forum.kiasuparents.com/post/1991017https://forum.kiasuparents.com/post/1991017Sat, 15 Aug 2020 04:09:44 GMTTom and Jerry had a number of cards in the ratio 3:8. Jerry and Mike had a number of cards in the ratio 2:1. If they had a total of 300 cards altogether, how many cards does Jerry have?


Explanation and solutions: https://wordpress.com/block-editor/post/owlsensei.com/407

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]]>https://forum.kiasuparents.com/post/1990125https://forum.kiasuparents.com/post/1990125Sun, 09 Aug 2020 07:41:15 GMTThe ratio of the number of girls to the number of boys on board the plane was 3:2. After another 26 girls and 26 boys boarded the plane at the transit stop, the ratio became 5:3. How many boy ands girls were there on the plane in the end?


Explanation and solutions:https://owlsensei.com/2020/08/06/p5-math-ratio-constant-difference/

]]>https://forum.kiasuparents.com/post/1989794https://forum.kiasuparents.com/post/1989794Thu, 06 Aug 2020 12:26:22 GMTSam is 25 years old and his son is 5 yrs old now. In how many years will Sam be thrice as old as his son?


Explanation and answers at https://owlsensei.com/2020/07/24/ratio-difference-unchanged-age/

]]>https://forum.kiasuparents.com/post/1988905https://forum.kiasuparents.com/post/1988905Sun, 02 Aug 2020 07:24:50 GMTMath: Postage Rate

https://owlsensei.com/2020/07/31/math-postage-rate/

]]>https://forum.kiasuparents.com/post/1988606https://forum.kiasuparents.com/post/1988606Fri, 31 Jul 2020 05:06:15 GMTWrote a topic on how to approach unchanged total question (Ratio). https://owlsensei.com/2020/07/18/p5-math-question-ratio-unchanged-total/

]]>https://forum.kiasuparents.com/post/1988400https://forum.kiasuparents.com/post/1988400Wed, 29 Jul 2020 14:11:25 GMTWrote a topic on how to approach unchanged total question (Ratio). https://owlsensei.com/2020/07/18/p5-math-question-ratio-unchanged-total/

]]>https://forum.kiasuparents.com/post/1988399https://forum.kiasuparents.com/post/1988399Wed, 29 Jul 2020 14:11:23 GMT