Quicker Maths » short method

Check Out The Year

admin — Thu, 21 Jul 2011 12:51:43 +0000

Turn of the Century Puzzle

Your grandfather, determined to start the year 1900 off right, went to bed at 7 p.m. on December 31, 1899, setting his alarm clock to wake him at 8 the next morning. He slept like a log. How many hours sleep did he get?

Ancient Coin Puzzle

A thief went to a shop that sold antique coins. He stole a coin from Emperor Alexander’s time that had 326 B.C. inscribed on it. These rare coins were worth $ 100 for every year of their age (years from date of minting till now). So how much did the thief get for his stolen coin?

Both the puzzles above have some similarity. There is a clue hidden in the title of the post itself.

Timing Puzzles

admin — Wed, 11 May 2011 21:30:16 +0000

Timing Puzzles

Timing Puzzle 1
Having 2 sand-glasses: one 7-minute and the second one 4-minute. How can you time correctly 9 minutes ?

Timing Puzzle 2
A teacher of mathematics used an unconventional method to measure a 15-minute time limit for a test. He just used 7 and 11-minutehourglasses. During the whole time he turned sandglasses only 3 times (turning both hourglasses at once count as one flip).

Explain how the teacher measured 15 minutes.

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Vacation Time

admin — Wed, 23 Sep 2009 09:43:07 +0000

It was vacation time, and so I decided to visit my cousin's home. In the mornings, we both would go for a jog. The evenings were spent on the tennis court. Tiring as these activities were, we could manage only one per day, i.e., either we went for a jog or played tennis each day. There were days when we felt lazy and stayed home all day long.

Now, there were 9 mornings when we did nothing, 13 evenings when we stayed at home, and a total of 12 days when we jogged or played tennis. For how many days did I stay at my cousin's place?

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Up an Escalator

admin — Wed, 23 Sep 2009 09:36:32 +0000

JimmyÂ takes the underground train to work and uses an escalator at the railway station. If Jimmy runs up 7 steps of the escalator, then it takes him 28.5 seconds to reach the top of the escalator. If he runs up 13 steps of the escalator, then it takes him only 19.5 seconds to reach the top.

How many seconds would it take Jimmy to reach the top if he did not run up any steps of the escalator at all?

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The Great Pizza Deal

admin — Wed, 23 Sep 2009 09:32:52 +0000

The 10" pizza sells for $ 3.99 at my favorite pizza store. The store claims they have a great deal on the large 12" pizza, which is specially priced at $ 4.88. What is the per cent discount the store is offering?

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The Snail on the Wall

admin — Tue, 22 Sep 2009 11:27:13 +0000

A snail creeps 6 ft up a wall during the daytime. After all the labor it does throughout the day, it stops to rest a while but falls asleep!! The next morning it wakes up and discovers that it has slipped down 3 ft while sleeping.

If this happens every day, how many days will the snail take to reach the top of a wall 18 ft in height?

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Speeding Away

admin — Thu, 17 Sep 2009 07:57:08 +0000

The drive from Oakland to Pinewood was a tricky one. I covered the uphill distance of 70 miles at 35 miles per hour. The return journey from Pinewood to Oakland was downhill, and I managed to drive at 63 miles per hour. What was my average speed for the entire journey?

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Grandpa’s Age

admin — Fri, 11 Sep 2009 10:54:39 +0000

Grandpa:

"My grandson is about as many days as my son is weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years?"

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A van containing pigeons on perches

admin — Mon, 07 Sep 2009 11:24:51 +0000

A van containing pigeons on perches is being weighed on a scale. Something scares the pigeons and they all begin flying around inside the van. Does the total weight of the van and pigeons change?

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A barge with one man

admin — Mon, 07 Sep 2009 11:22:35 +0000

A barge with one man and a load of iron scrap is on a barge floating in a lock in the Panama Canal. If the man throws some iron off the barge into the water, what will happen to the water level on the side of the lock?

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