NUMBER BASES

Time allowed: 45 Minutes

Calculators are NOT allowed

(1) 213 eight + 755 eight =

1430 eight

1362 eight

1170 eight

1162 eight

(2) In base ten, 134 five equals...

8

20

40

44

(3) 756 eight − 127 eight =

625 eight

627 eight

327 eight

637 eight

(4) Change 134 eight to base ten.

36 ten

192 ten

92 ten

88 ten

(5) Change 38 ten to base five

123 five

321 five

213 five

132 five

(6) 13 five + 24 five =

43 five

42 five

44 five

40 five

(7) 27 can be written in base five as...

120 five

102 five

101 five

100 five

(8) Change 13 base ten to base two.

1101 two

1011 two

1010 two

1110 two

(9) Change 55 eight to base ten.

45

50

36

20

(10) Count 16 bottles in base eight

20 eight

02 eight

102 eight

13 eight

(11) 66 in base five is...

13 five

132 five

213 five

231 five

(12) If 0, 1, 2, 3 and 4 are the only digits used to write numbers, then the number base is...

Ten

Eight

Five

Four

(13) Change 56 eight to base ten.

40 ten

46 ten

48 ten

56 ten

(14) 142 eight + 174 eight equals...

222 eight

236 eight

316 eight

336 eight

(15) Change 174 base eight to base ten.

124

164

184

174

(16) 32 eight − 14 eight =

14 eight

15 eight

16 eight

18 eight

(17) 134 eight in base ten is...

36

88

92

192

(18) Subtract 327 eight from 765 eight.

536 eight

437 eight

463 eight

436 eight

(19) 31 five + 43 five =

124 five

421 five

241 five

74 five

(20) 44 five in base ten is written as....

14

24

114

34

(21) Change 235 eight to base ten.

149

93

157

95

(22) Write 9 in base five.

9 five

13 five

14 five

15 five

(23) Change 15 to base five.

33 five

15 five

13 five

30 five

(24) Change 134 eight to base ten.

36

192

92

88

(25) Change 38 to base five.

123 five

321 five

213 five

132 five

(26) 323 eight + 265 eight =

610 eight

588 eight

598 eight

58 eight

(27) By how much is 232 five less than 321 five?

34 five

24 five

134 five

89 five

(28) Change 175 base ten to base five.

35 five

200 five

1 000 five

1 200 five

(29) Kitapa is 54 years old. What is her age in base 8?

66 eight

60 eight

56 eight

43 eight

(30) Change 242 five to base ten.

52

72

242

1 432