Page 162 - NUMINO Challenge_M2
P. 162
If 3 sacks of sand are moved from storage A to storage B every day, the
number of sacks in storage A will decrease by 3 each day and the number
of sacks in storage B will increase by 3 each day. Use a table to express
this data.
Storage A Day 0 Day 1 Day 2 Day 3 Day 4 Day 5
Storage B 55 52 49 46 43 40
5 8 11 14 17 20
On the 5th day, the number of sacks of sand in storage A is twice the
number in storage B.
If your hearing is times as good, you can hear something ( ^2) times
as far. The dog's hearing is 2 times as good as a cat's, so it can hear 4
times as far. A cat's hearing is 3 times as good as a human's, so it can
hear 6 times as far. The dog can hear 2 times better than a cat, so the
dog's hearing is (2^3) times better than a human's. The dog can hear 12
times farther than a human.
The dog's hearing is 24 units on the grid.
The distance a cat can hear, , is ^4=24 =6 units.
The distance a human can hear, , is ^24=24 =1 unit.
Dog’s Hearing Distance
On a calendar, the difference between the date and the date to the right is
1 and the difference between the date and the date below is 7. If the date
of (A) is , then the colored portion can be as shown below.
+1
+7 +8
The sum of the dates in the colored portion is + +1+ +7+
+8=76, so + + + =60 and =15.
25Answer Key
number of sacks in storage A will decrease by 3 each day and the number
of sacks in storage B will increase by 3 each day. Use a table to express
this data.
Storage A Day 0 Day 1 Day 2 Day 3 Day 4 Day 5
Storage B 55 52 49 46 43 40
5 8 11 14 17 20
On the 5th day, the number of sacks of sand in storage A is twice the
number in storage B.
If your hearing is times as good, you can hear something ( ^2) times
as far. The dog's hearing is 2 times as good as a cat's, so it can hear 4
times as far. A cat's hearing is 3 times as good as a human's, so it can
hear 6 times as far. The dog can hear 2 times better than a cat, so the
dog's hearing is (2^3) times better than a human's. The dog can hear 12
times farther than a human.
The dog's hearing is 24 units on the grid.
The distance a cat can hear, , is ^4=24 =6 units.
The distance a human can hear, , is ^24=24 =1 unit.
Dog’s Hearing Distance
On a calendar, the difference between the date and the date to the right is
1 and the difference between the date and the date below is 7. If the date
of (A) is , then the colored portion can be as shown below.
+1
+7 +8
The sum of the dates in the colored portion is + +1+ +7+
+8=76, so + + + =60 and =15.
25Answer Key
