Page 161 - NUMINO Challenge_M2

Answer
Key

Creative Thinking

Find the operation symbol that can be changed so that the result of the
expression is 10.

4 ^ 8 + 4 - 6 = 10

4 + 8 + 4 - 6 = 10
The addition symbol was incorrectly seen as a multiplication symbol.

Use a table to find the number of paper cranes that are placed in jars A, B,
and C.

12345

Number of cranes left 9 8 7 6 5

43

43

The number of paper cranes in jars A and B must be the same, so the

number of paper cranes in jar C must be an even number. If jar C has 4
paper cranes, jars A and B will have 3, which is less than the number of
paper cranes in jar C. Therefore, jar C will hold 2 paper cranes and jars A and
B will hold 4 paper cranes each.

A: 4, B: 4, C: 2

Use a table to show Leslie's, Carla's, and their Uncle's ages.

This 1layteear r 2 years 3lyaetearrs 4 years 5lyaetearrs 6lyaetearrs 7lyaetearrs 8lyaetearrs 9 years 10layteearrs
Year later later later

Leslie 12 13 14 15 16 17 18 19 20 21 22

Carla 10 11 12 13 14 15 16 17 18 19 20

(Leslie)+(Carla) 22 24 26 28 30 32 34 36 38 40 42

Uncle 32 33 34 35 36 37 38 39 40 41 42

The sum of Leslie’s and Carla’s age will be their uncle's age after 10 years.

24 NUMINO Challenge M2