Quicker Maths » Speedy Calculation

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.

Leave your answers below

You have 12 coins, one of which is fake.

admin — Sun, 16 Jan 2011 18:56:25 +0000

Hey friends, try and solve this intricate puzzle. You can use your skills to explain this puzzle using a flow chart. If you make one send it to me on my email address, I will include it in the body of this post itself.

12 coins 3 weighings

You have 12 coins, one of which is fake. The fake coin is indistinguishable from the rest except that it is either heavier or lighter, but you don't know which. Can you determine which is the fake coin and whether it is lighter or heavier using a balance scale and only 3 weighing?

Astral Maths

admin — Tue, 13 Oct 2009 13:41:42 +0000

Look at the shape below and answer the following questions on it.

1. How many triangles are there in the diagram?
2. How many rectangles are there in the diagram?
3. How many hexagons can you find?
4. Deduct the sum of the numbers in the rectangles from the sum of the numbers in the triangles.

If 1=5

admin — Wed, 07 Oct 2009 12:49:52 +0000

If 1=5

2=6

3=7

4=8

5=?

Change a hundred rupee

admin — Wed, 07 Oct 2009 12:47:54 +0000

Change a hundred rupee note into 50 notes. No Rs. 2 coin is allowed.

A beggar’s brother died

admin — Wed, 07 Oct 2009 12:31:00 +0000

A beggarâ€™s brother died, but the man who died had no brother.

How could this be...?

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?

Leave your answers below:

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?

Leave your answers below:

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?

Leave your answer below: