CHALLENGE 9-12 QUESTIONS AND ANSWERS
from Tuesday Nov.15
will be in IBOX also
CHALLENGE 9:
How many odd pages are there in a book 479 pages long?
CHALLENGE 9 ANSWER:
240
CHALLENGE 10:
What is the missing number in the following sequence?
3 ... 7 ... 15 .. ___ .. 63 ... 127
CHALLENGE 10 ANSWER:
31. Double each number and add 1 to get the next number
like this:
3+3+1=7
7+7+1=15
15+15+1=31
31+31+1=63
63+63+1=127
CHALLENGE 11:
How many minutes is it before six o'clock if fifty minutes ago it was four times as many minutes past three o'clock?
CHALLENGE 11 ANSWER:
Twenty-six minutes
CHALLENGE 12:
Complete the series by adding the next number:
0...0...1...2...2...4...3...6...4
CHALLENGE 12 ANSWER:
8. There are two series of numbers, both starting with zero. The first is 0, 1, 2, 3, 4, in every other place.
The second is 0, 2, 4, 6, 8.