Clocks and Mods
Which one has a zero at the top?
Mods
If a bigger number is in front of a smaller number, you (pick one: add or subtract).
add
14six + 25six = _____ six
43six
32four X 3four = _____four
222four
If a number does not state what base it is in, what can we assume?
That it is using base 10.
When finding the additive inverse, what is the identity element?
0 for mods or the clock number for clocks
XLV = ???
XLV = 45
43six - 21six = ____ six
22six
13four X 23four = _____four
1031four
What is 142five in base ten?
47
When finding the multiplicative inverse, what is the identity element?
1
654 in Roman numerals is
DCLIV
262seven - 161 seven =_____seven
101seven
1101two X 11two = ____two
100111two
What is 243six in base ten?
99
14 ≡ ___ mod 4.
(What number would it show on the mod?)
2 mod 4
What is MMCMLXXVIII
2978
2471eight + 1536eight = _____eight
4227eight
634eight X 52eight =_____eight
41360eight
What is 11010two in base ten?
26
3X5=_____ on a 6 clock
3 on a 6 clock
True or False:
IM = 999
False. You can only subtract symbols that are 1 or 2 places away from the bigger one. I is too far away.
A41sixteen - 2BCsixteen = ______sixteen
785sixteen
What's wrong with this? Solve it once you've corrected it.
102two X 101two
102two should be 110two.
110two X 101two = 11110two
What is 2D4Fsixteen in base ten?
11599