Page 111 - NUMINO Challenge_C2
P. 111
Creative Thinking
1 George bought 5-cent, 10-cent, and 30-cent envelopes. He paid $1.40
for the envelopes. If he bought 9 envelopes and did not buy more than
5 of each type of envelope, how many 5-cent envelopes did he buy?
5-cent 10-cent 30-cent
envelope envelope envelope
2 There is a balance scale with several 5-g and 7-g weights. If the
weights can be placed only on one side of the balance scale, how
many weights cannot be measured?
108 NUMINO Challenge C2
1 George bought 5-cent, 10-cent, and 30-cent envelopes. He paid $1.40
for the envelopes. If he bought 9 envelopes and did not buy more than
5 of each type of envelope, how many 5-cent envelopes did he buy?
5-cent 10-cent 30-cent
envelope envelope envelope
2 There is a balance scale with several 5-g and 7-g weights. If the
weights can be placed only on one side of the balance scale, how
many weights cannot be measured?
108 NUMINO Challenge C2
