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Basic Math Rules, Roman Numbers, Math Tricks that will Blow your Mind, 15 math tricks for fast calculation. calender, measurement system

Measurement System

Area

100 square millimetres (sq.mm.) - 1 square centimetre (sq.cm.)
100 square centimetres (sq.cm.) - 1 square decimetre (sq.dm.)
100 square decimetres (sq.dm.) - 1 square metre (sq. m.)
100 square metres (sq.m.)- 1 square decametre (sq.dam.)
100 square decametres (sq.dam.) - 1 square hectometre (sq.hm.)
100 square hectometres (sq.hm.) - 1 square kilometre (sq.km.)

Others
100 sq.m.-1are
100 ares- 1 hectare
100 hectareas - 1sq.km.
1 hectare - 10,000 sq.m.
1 sq.km - 100 hectares

Metric measures of capacity
10 millilitres (ml) - 1 Centilitre (c/)
10 centilitres (cl)- 1 decilitre (dl)
10 decilitres (dl 1 litre(1)
10 litres(1)-1 decalitre (dal)
10 decalitres (dal) - 1 hectolitre (hl)
10 hectolitres (hl)- 1 kilolitre (kl)
1 litre (1)= 100 centilitres
=1000 Millilitres
1 Kilolitre (kl) = 1000 litres

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Some Special number names
Nought= 0
1 Unit= 1
2 Unit= 1 Pair
12 Unit= 1 Dozen
1 Gross= 12 Dozen
1 Great Gross= 12 Gross

Metric measures of weight

10 milligrams (mg)- 1 centigrams (cg)
10 Centigram (cg)- 1decigrams (dg)
10 decigrams (dg)- 1 gram (g)
10 grams(g)- 1 decagram (dag)
10 decagrams (dag)- 1 hectogram (hg)
10 hectograms(hg)- 1 kilogram (kg)
1 gram (gm) = 100 centigrams
= 1000 milligrams

Other Measures

1 kilogram- 1000 grams
100 kilograms - 1 quintal
ram (cg)
10 quintals- 1 metric ton
1 ton- 1000 kilograms
1000 tons- 1 kiloton
1000 kilotons- 1 megaton
1 megaton-1 million tons
1 ounce - 28.35 g.
1 pound- 453.59 g.
1 metric ton - 1000 kg.
1 grain- 64.8 mg.
1 carat- 200 mg.

Measures of time

60 Seconds - 1 Minutes
60 Minutes - 1 Hour
24 Hours- 1 Day
7 Days- 1 Week
2 Weeks- 1 Fortnight
4 Weeks- 1 Month
365 Days- 1 Year
366 Days- 1 Leap year
12 Months -1 Year
52 Weeks- 1 Year
10 Years - 1 Decade
100 Years- 1 Century
1000 Year -1 Millennium
1 Year - Anniversary
10 Years- Decade
25Years - Silver Jubilee
50Years- Golden Jubilee
60 Years - Diamond Jubilee
75 Years- Platinum Jubilee
100 Years- Centenary
1000 Years- 1 Millennium

Metric Measures of Length

10 Millimetres(mm)-1 Centimetre (cm)
10 Centimetres (CM) - 1 Decimetre (dm)
10 Decimetres (dm) -1 Metre(m)
10 Metres(m)- 1 Decametre (dam)
10 Decametres (dam) - 1 Hectometre (hm)
10 Hectometres (hm) - 1 Kilometre (km)
1 metre (m)= 100 centimetres
= 1000 millimetres

Other Measures
1Inch- 2.54 cm
1 Foot - 30.48 cm
1Yard- 91.44 cm
1Mile-1.61 km
1Furlong- 201.17 m
12 Inches-1 foot
3 Feet - 1 yard
220 Yard - 1 furlong
8 Furlong - 1 mile
1 mile - 1760 Yards-5280 feet

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Temperature
Temperature tells us how hot or cold an object is. We use a Thermometer to measure temperature.
Temperature is measured in degree centigrade (C) or degree Fahrenheit (F).

Conversion of Temperature
From "C to 'F
F=(CX9)/5+32
From "F to 'C
C=[(F-32)*5]/9

Calendar

English Calendar

Days of the week
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

Hindi Calendar

Somvar
Mangalvar
Budhvar
Brihaspatiwar/ Guruvar
Shukravar
Shanivar
Ravivar

Muslim Calendar
Etwar

Peer
Mangal
Budh
Jumerat
Juma
Sanichar

Parsi Calendar Year
Months Days
Farvardin 30 days
Ardibahest 30 days
Khordad 30 days
Tir 30 days
Amardad 30 days
Shaherewar 30 days
Meher 30 days
Avan 30 days
Adar 30 days
Dae 30 days
Bahman 30 days
Asphandarmad 30 days
Gatha days 5 days
365 days

Muslim Calendar Year
Months Days
Muharram 30/29 days
Safar 30/29 days
Rabi-ul-awwal 30/29 days
Rabi-ul-aakhir 30/29 days
Jamadi-ul-awwal 30/29 days
Jamadi-ul-aakhir 30/29 days
Rajab 30/29 days
Shaban 30/29 days
Ramzan (Ramadam) 30/29 days
Shawwal 30/29 days
Zilgaad 30/29 days
Zilhajj 30/29 days
(Days are changeable)

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English (Gregorian) Calendar
Month No. of Days
January 31 days
February 28/29 days
March 31 days
May 31 days
June 30 days
July 31 days
August 31 days
September 30 days
October 31 days
November 30 days
December 31 days

365/366 days

Indian National Calendar
Month No. of Days Starts from
Vaishakha 31 days April 14
Jyaishtha 30 days May 15
Ashadha 31 days June 15
Shravana 31 days July 17
Bhadrapada 31 days August 17
Ashwina 31 days September 17
Kartika 31 days October 18
Margashira 30 days November 17
Pusha 29 days December 16
Magha 30 days January 14
Phalguna 31 days February 13
Chaitra 30 days March 14

February has 29 days in a Leap year
(Appx. calculation as per Sankranti, may change time to time) Leap Year
A leap year comes every fourth year. If the last 2 digits of the year is divisible by 4, then it is a leap year. A leap year has 366 days instead of 365 days and the month February is 29 days. Example The year 1996, 2000, 2004, 2008, 2012

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