Page 114 - NUMINO Challenge_A1

Challenge Yourself

01 The greatest number:

20 4 6 20 4 6 6 4 20 64 2 0
6 20 4 62 0 4
The second greatest number:

20 4 6 20 4 6

02 6 should be placed in the first blank to make sure that the greater number cards are

placed at the beginning.

6

Since the difference between every two adjacent number cards is more than 1, and the
greater number cards should be placed at the beginning, the numbers should be
arranged as shown below.

64 642

Out of the number cards that have a difference of greater than 1 with the number card 2,
5 is the greatest.

6425

Fill in the blanks with the remaining number cards according to the conditions.
64253 1

03 The greatest product you can make with the given digits is 210 3 630.

If the 1-digit number is 3, the 2nd greatest product is 201 3 603.

If the 1-digit number is 2, the greatest product is 310 2 620.

Therefore, the second greatest product is 620.

04 Since is the ones digit of the sum , must be 0.

0 When the ones digit of the sum of the tens column is 0, 10.
in the hundreds column can either be 3 or 4.

40 Since 1 is carried over from the tens column, must be 3.

10 3 10 7 370

9Answer Key