Important formulas for Navodaya entrance exam
SQUARE OF NUMBERS
1² =1
2² =4
3² =9
4² =16
5² =25
6² =36
7² =49
8² =64
9² =81
10² =100
11² =121
12² =144
13² =169
14² =196
15² =225
16² =256
17² =289
18² =324
19² =361
20² =400
21²= 441
22² =484
23² =529
24² =576
25² =625
26² = 676
27² =729
28² =784
29² =841
30² =900
31² =961
32² =1024
33² =1089
34² =1156
35² =1225
36² =1296
37² =1369
38² =1444
39² =1521
40² =1600
41² =1681
42² =1764
43² =1849
44² =1936
45² =2025
46² =2116
47² =2209
48² =2304
49² =2401
50² =2500
CUBE OF NUMBERS
1³ =1
2³ =8
3³ =27
4³ =64
5³ =125
6³ =216
7³ =343
8³ =512
9³ =729
10³ =1000
11³ =1331
12³ =1728
13³ =2197
14³ =2744
15³ =3375
16³ =4096
17³ =4913
18³ =5832
19³ =6859
20³ =8000
21³ =9261
22³ =10648
23³ =12167
24³ =13824
25³ =15625
SQUAREROOT OF NUMBERS
1½ =1
2½ =1.414
3½ =1.732
4½ =2
5½ =2.23606
6½ =2.44948
7½ =2.64576
8½ =2.82842
9½ =3
10½ =3.16227
MEASURING OF LENGTH
10 millimeters = 1 centimeter
10 delimiters = 1 meter
10 decameters = 1 hectometer
10 kilometers = 1 miriameter
10 centimeters = 1 decimeters
10 meters = 1 decameter
10 hectometer = 1 kilometer
UNITS OF MEASUREMENT
10 milligrams =1 centigram
10 decigrams = 1 gram
10 decagrams = 1 hectogram
10 kg = 1 miriagram
10 quintals = 1 ton
10 centigrams = 1 decigram
10 grams =1 decagram
10 hectograms =1 kilogram
10 miriagrams = 1 quintal