A. greater than 1
B. equal to 1
C. equal to 1/2
D. equal to ¼
A. 19
B. 20
C. 21
D. 22
let her age be x
after 1 year her age will be x+1=2(x-10)
x+1=2x-20
1+20=2x-x
x=21 years
A. Neither increased nor decreased
B. Increased by 1%
C. Decreased by 1%
D. Decreased by 10%
A. 36
B. 66
C. 132
D. 264
Explanation:
12 * 396 = 36 * x
x = 132
A. 15 zeros
B. 18 zeros
C. 21 zeros
D. None of these
Thousand, Million, Billion, Trillion, Quadrillion, Quintillion-each comes with three additional zeroes. Even though there are names beyond Quintillion.
The numbers are written with scientific notation to make them easier to read and understand.
| Name | Number |
| Million | 1 x 106 |
| Billion | 1 x 109 |
| Trillion | 1 x 1012 |
| Quadrillion | 1 x 1015 |
| Quintillion | 1 x 1018 |
| Sextillion | 1 x 1021 |
| Septillion | 1 x 1024 |
| Octillion | 1 x 1027 |
| Nonillion | 1 x 1030 |
| Decillion | 1 x 1033 |
| Undecillion | 1 x 1036 |
| Duodecillion | 1 x 1039 |
| Tredecillion | 1 x 1042 |
| Quattuordecillion | 1 x 1045 |
| Quindecillion | 1 x 1048 |
| Sexdecillion | 1 x 1051 |
| Septendecillion | 1 x 1054 |
| Octodecillion | 1 x 1057 |
| Novemdecillion | 1 x 1060 |
| Vigintillion | 1 x 1063 |
| Unvigintillion | 1 x 1066 |
| Duovigintillion | 1 x 1069 |
| Trevigintillion | 1 x 1072 |
| Quattuorvigintillion | 1 x 1075 |
| Quinvigintillion | 1 x 1078 |
| Sexvigintillion | 1 x 1081 |
| Septenvigintillion | 1 x 1084 |
| Octovigintillion | 1 x 1087 |
| Nonvigintillion | 1 x 1090 |
| Trigintillion | 1 x 1093 |
| Untrigintillion | 1 x 1096 |
| Duotrigintillion | 1 x 1099 |
| Ten-duotrigintillion (or Googol) | 1 x 10100 |
| Skewer’s Number | 1 x 10130 |
| Centillion | 1 x 10303 |
| Googolplex | 1 x 1010100 |
A. 308 sq cm
B. 220 sq cm
C. 440 sq cm
D. 132 sq cm
r = 7 h = 3
2πr(h + r) = 2 * 22/7 * 7(10) = 440
A. 4
B. 60
C. 1.75
D. None of these
Explanation:
[(7 * 9) + (2 * 12) + 3]/[(12 * 3) + (81/9)] = (63 + 24 + 3)/(36 + 9) = 90/45 = 2