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Lower primary school mathematics question LPQ98
Hairu had 28 more stickers than Sarin. After Hairu gave away 5 stickers, he had twice as many beads as Sarin. How many stickers did Hairu have at first?
Given Hairu had twice as many stickers as Sarin finally, we can build the model for “at first” as below shown.
Per the model,
1U = 28 – 5 = 23
The number of stickers Hairu had at first = 2 × 23 + 5 = 51
The number of stickers that Sarin had no change ==> 1U
The number of stickers that Hairu had at first ==> 1U + 28
Hairu given away 5 stickers and he had twice as many of stickers as Sarin
The number of stickers Hairu had finally ==> 2U = 1U + 28 – 5 = 1U + 23
Since no change for Sarin
1U ==> 23 stickers
The number of stickers Hairu had at first = 23 + 28 = 51