Page 142 - NUMINO Challenge_M2

2 Find a pattern on the left and the right sides separately.

Left side: 5, 4, , 2 Number sequence decreasing by 1

Right side: 8, 4, 2, Number sequence decreasing by 4, 2,

The numbers that fit in the blanks are 3 and 1.

Type Study In the number chart, the numbers increase by 1 as you move to the right
and increase by 7 as you move down.

One space to the left of 11 is 11-1=10. 10 11
The number that is 3 spaces below 10 is 10+7+7+7=31. 31

The number that is 2 spaces below 11 is 11+7+7=25. 11

The number that is 3 spaces to the right of 25 is 25+3=28. 25 28

Problem solving

1 In the number chart, the numbers from 1 to 10 and 11 to 20 have the same

number sequence. 21 to 30 and 31 to 40 also follow the same number
sequence. 41 falls in the same column as 1, 11, 21, and 31, so it is under the
letter A.

2 The sequence of numbers in the triangle is all odd numbers increasing from the

top to the bottom and left to right. The following shows the missing numbers
on the bottom row.

1 5Answer Key
357
9 11131517
19 212325272931
333537 3941 43 454749

The sum of the numbers in A and B is 41+47=88.