### Dictionary Rank of a Word | Permutations & Combinations

PERMUTATIONS & COMBINATIONS Rank of the word or Dictionary order of the English words like COMPUTER, COLLEGE, SUCCESS, SOCCER, RAIN, FATHER, etc. Dictionary Rank of a Word Method of finding the Rank (Dictionary Order) of the word  “R A I N” Given word: R A I N Total letters = 4 Letters in alphabetical order: A, I, N, R No. of words formed starting with A = 3! = 6 No. of words formed starting with I = 3! = 6 No. of words formed starting with N = 3! = 6 After N there is R which is required R ----- Required A ---- Required I ---- Required N ---- Required RAIN ----- 1 word   RANK OF THE WORD “R A I N” A….. = 3! = 6 I……. = 3! = 6 N….. = 3! = 6 R…A…I…N = 1 word 6 6 6 1 TOTAL 19 Rank of “R A I N” is 19 Method of finding the Rank (Dictionary Order) of the word  “F A T H E R” Given word is :  "F A T H E R" In alphabetical order: A, E, F, H, R, T Words beginni

### Important Unit Conversion in Mathematics

Unit conversion table in mathematics, important units and their conversion in mathematics.Changing between units of measurement,Roman numerals into Hindu arabic, prime numbers from 1 to 120

IMPORTANT UNITS CONVERSION  IN MATHEMATICS

 10mm (millimeter) 1cm 10cm(centimeter) 1dm 10dm(Decimeter) 1m 10m (Meter) 1 Dam 10Dam (Decameter) 1 Hm 10 Hm (Hectometer) 1Km ( Kilometer) 1 Are (a) 100 m2 1 Hectare(Ha) 10000 m2 100 Ares 1 Hectare 100 Hectares 1 Km2 1 KM 1000 m 100000 cm

 1 cm3 1 ml (millilitre) = 1/1000 Litres 1 dm3 1 l (litre) 1 m3 1 Kl (Kilolotre) = 1000 Litres

 1 Score 20 Pieces 1 Ream 500 Pages Or 25 Score 1 Quire 24 Pieces 1 Pound 454 gm = About 0.5 Kg 1 Mile 1.6 Km 1 Inch 2.54 cm 12 Inch 1 Foot = 30 cm 36 Inches 1 Yard 3 Feet 1 Yard 1760 Yard 1 mile 1metre 39 Inches or 100 cm a   Km/h (a x 5/18 ) m/s a m/s (a x 18/5) Km/h 1 Gallon 4.5 Litres Formula for inter conversion of Celsius scale, Fahrenheit Scale and Reaumur Scale $\frac{F-32}{9}=\frac{C}{4}=\frac{R}{4}$

 60 Seconds 1Minute 60 Minutes 1 Hour 24 Hour 1 day 7 days 1 week About 4 weeks 1 month 12 months 1 year 10 year 1 decade 100 years 1 century 1000 years 1 millennium

 Acute Angle Angle between 0o and 90o Right Angle Angle of 90o Obtuse Angle Angle Between 90o and 108o Straight Angle Angle of 180o Reflex Angle Angle between 180o and 360o Complete angle 360o

 Nano 10-9m Micro 10-6 m Milli 10-3 Centi 10-2 m Deci 10-1 m All conversion into Base units  Metre, Deka(Da) 10 m Hecto 100 m Kilo 103 m Mega 106 m Giga 109 m Tera 1012 m

 Quantity Units Distance, Displacement, Perimeter, Circumference mm, cm, dm, m, da, Curved surface Area, Total Surface Area mm2, cm2, dm2, m2, are, hectare Volume, Capacity mm3, cm3, dm3 or litre, m3 or Kilolitre Time Second, minute, hour, day, month, year Money Paise, Rupees

 ROMAN NUMERALS INTO HINDU ARABIC Roman Numerals Hindu Arabic Roman Numerals Hindu Arabic I 1 CL 150 II 2 CC 200 III 3 CCL 250 IV 4 CCC 300 V 5 CD 400 VI 6 D 500 VII 7 DL 550 VIII 8 DC 600 IX 9 DCC 700 X 10 DCCC 800 XX 20 CM 900 XXX 30 M 1000 XL 40 MC 1100 L 50 MD 1500 LX 60 MM 2000 LXX 70 MMM 3000 LXXX 80 XC 90 C 100

 List of Prime Numbers From 1 to 120 2 23 59 97 3 29 61 101 5 31 67 103 7 37 71 107 11 41 73 109 13 43 79 113 17 47 83 119 19 53 89

Note:-There are 10 prime numbers from 1 to 30
There are 25 prime numbers from 1 to 100

 OLD INDIAN SYSTEM OF NUMERATION FOR MONEY 4 दमड़ी 1 पैसा 4 पैसे 1 आना            = 3 पाई 16 आने 1 रुपये OLD INDIAN SYSTEM OF NUMERATION FOR WEIGHT 8 रति 1 मासा 12 मासे 1 तोला 5 तोले 1 छटांक 40 सेर 1 मण           = 16 किलोग्राम 2.5 सेर 1 किलोग्राम 1 बटी      =   5 सेर 2 किलोग्राम 1 धडी     =   10 सेर 4 किलोग्राम PRESENT  SYSTEM OF NUMERATION FOR WEIGHT 1 Gram 1000 milligram 1 Decagram 10 Gram 1 Hectogram 100 Gram 1 Kilogram 1000 Gram 1 Quintal 100 Kg 1 Metric Ton 1000 Kg

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