Singapore 4th Grade Math Worksheet: 14 Challenging ...

[Pages:11]Singapore 4th Grade Math Worksheet: 14 Challenging Problems

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Math Word Problem 1

Marvin Mouseketeer was tired of being bullied by K itty Catketeer. He wanted to buy a sharp sword to slice up the cat. A good sword costs $244. However, Mouseketeer had only $154 in his pocket. If he could save $6 each month, how long will it take him in years and months before he could deal with the cat?

Math Word Problem 2 I bought a baby anaconda that was 7 m long. I couldn't wait for my baby anaconda to be 100 m long because I wanted to cook delicious snake spaghetti. If the anaconda grew 3 m every month, how long would it take in years and months before I could cook my spaghetti?



Math Word Problem 3 Curt Cockerel insulted Randy Rooster for being stupid. Randy was so angry that he decided to buy some boxing gloves and punch the living daylights out of Curt. A pair of boxing gloves cost $160. Randy had only $72 with him but he was able to earn $8 a week by crowing for Farmer Fred every morning. How long will it take Randy in months and weeks to buy the boxing gloves?

Math Word Problem 4 I wanted to build a pool where I could put some crocodiles and do some scuba-diving. Therefore, I built a hole 150 m deep in my backyard. I was able to add 42 m of water to the pool that day. I didn't add any water after that because I wanted the pool to be filled up by natural rainwater. If there was enough rain to fill up the pool every week for 12 m, how long will it take in months and weeks before I could do my scuba-diving?

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Math Word Problem 5 Captain Crook wanted to buy a remote island that cost $1000. He had $792 with him. If could raid a ship and steal $16 every week, how long wil l it take him in months and weeks before he could buy the island?

Math Word Problem 6 Sally and Wally went fishing and caught the same number of mermaids. Sally was happy so she went back home with her mermaids. Wally continued fishing and caught another 504 mermaids. After that he had 5 times as many mermaids as Sally. How many mermaids did both of them catch altogether?

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Math Word Problem 7 Gary Ghost and Sam Spirit went trick-or-treating on Halloween and collected the same number of chocolate-covered shrunken heads. Gary Ghost went back home to eat his shrunken heads. Sam Spirit continued trick-or-treating and collected another 267 shrunken heads before he too went back home. Sam had 4 times as many shrunken heads as Gary after that. How many shrunken heads did they collect altogether?

Math Word Problem 8 Wally Vampire and Count Cuckoola transformed themselves into bats. They flew into Farmer Fred's house because he had a large family. Wally Vampire drank twice as much blood as Count Cuckoola before Count Cuckoola became queasy and decided to head back to his castle. Wally Vampire sucked up a further 1.4 liters of blood from the unlucky family before he was sated and also flew back home. If Wally had drunk 6 times as much blood as Cuckoola, how much blood did they drink that night?

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Math Word Problem 9 Smart Seinstein and Clever Keinstein were brothers who took part in IQ competitions all over the world and won many medals. By the end of March 2008, Seinstein had already won twice as many medals as Keinstein. Keinstein then swallowed all his medals in a fit of anger, got very ill and couldn't take part in any more competitions. Seinstein continued to take part in competitions and won a further 138 medals in 2008. In fact, Seinstein won 8 times as many medals as Keinstein in 2008. How many medals did they win altogether?

Math Word Problem 10 My pet troll gave birth to 2 cute baby trolls, one hairy and the other bald. By the end of April 2006, the hairy baby was thrice as tall as the bald baby. The bald baby stopped growing after that because of a dreadful disease. By the end of December 2006, the hairy baby had grown another whopping 28.8 m and ended up being 12 times as tall as the bald baby. What was the combined height of the two babies at the end of the year?

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Math Word Problem 11 Peter Paratrooper and Curt Commando landed in Bofgwanustoon to kill some desperate terrorists. On their first day, Peter gunned down twice as many miserable terrorists as Curt and was very proud of it. However, he was bitten by a mosquito that night and came down with malaria. He had to be hospitalized immediately. Curt continued killing 1465 terrorists the next day and had killed thrice as many terrorists as Peter after that. How many terrorists kicked the bucket altogether?

Math Word Problem 12 A shark-kissing competition is held in Abroga every year. In 2009, Andy and Randy jumped into the sea and began kissing so me hungry sharks earnestly. At the end of 1 hour, Andy had kissed 3 times as many sharks as Randy before a ferocious bull shark bit off Andy's nose. Andy quit the competition after that but Randy continued kissing. He kissed a further 736 approachable sharks before he was declared the winner. If Randy kissed 3 times as many sharks as Andy in the end, how many sharks did they peck altogether?

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Math Word Problem 13 Flora and Dora loved to play chess. From January to March, Flora won 4 times as many games as Dora. Dora was tired of losing so she bought a book on chess and studied it. She won all her games against Flora after that. By the end of the year Dora had won a further 525 games. In fact, Dora won twice as many times as Flora that year. How many chess games did they play altogether?

Math Word Problem 14 Two zealous janitors, Zedd and Jedd, made a New Year's resolution in 2005 that they would clean all the toilet bowls in their country. By the end of June, Zedd had cleaned twice as many toilet bowls as Jedd and boasted about it. However, Zedd accidentally swallowed a fly the next day and got a terrible disease. He was laid up in bed for the rest of the year. Jedd gleefully continued cleaning another 1368 toilet bowls until the end of the year. In the end, Jedd had cleaned 5 times as many toilet bowls as Zedd. How many toilet bowls did they clean altogether in the year 2005?

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Math Word Problem 15 Hairdresser Hilary had thrice as many female customers as male customers in January. Female customers stopped coming to her in February because she accidentally shaved one girl bald at the end of January. However, male customers continued to come to her and she had 84 male customers in February. In the two months, Hilary had 5 times as many male customers as female customers. How many customers did she have altogether?

Math Word Problem 16 Clara, Wendy and Tom went frog hunting in the woods and caught a total of 405 juicy frogs. The number of frogs Tom caught was twice as many as the total number C lara and Wendy caught. If C lara caught 53 frogs, how many more frogs than Wendy did Tom catch?

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