Page 70 - NUMINO Challenge_A1
P. 70
Problem solving
1 Numbers are arranged in a certain sequence below. Key Points
Find the ninth number.
First, figure out how
the terms increase.
1, 4, 7, 11, 14, 17, 21,
2 Numbers are arranged in a certain sequence below. A sequence that
Find the missing number. starts with 1 and
1, 3, 2, 5, 4, 7, 7, 9, 11, , skips every other
number (1, 2, 4, 7, )
and a sequence that
starts with 3 and
skips every other
number (3, 5, 7, 9, )
are different.
67Patterns
1 Numbers are arranged in a certain sequence below. Key Points
Find the ninth number.
First, figure out how
the terms increase.
1, 4, 7, 11, 14, 17, 21,
2 Numbers are arranged in a certain sequence below. A sequence that
Find the missing number. starts with 1 and
1, 3, 2, 5, 4, 7, 7, 9, 11, , skips every other
number (1, 2, 4, 7, )
and a sequence that
starts with 3 and
skips every other
number (3, 5, 7, 9, )
are different.
67Patterns
