starter Set 55 Form Exercise

Number Pyramid: Each block equals the sum of the two blocks below it. Fill the missing values. Pyramid (top to bottom): [18] → [9, _] → [5, _, 5]

Show answer

Answer: Row2[2]=9, Row3[2]=4

SubType
number-pyramid
Difficulty
starter
Levels
  • [18]
  • [9,9]
  • [5,4,5]
Base
  • 5
  • 4
  • 5
TopValue
18
HiddenCells
  • {"r":1,"c":1,"v":9}
  • {"r":2,"c":1,"v":4}

Number Pyramid: Each block equals the sum of the two blocks below it. Fill the missing values. Pyramid (top to bottom): [_] → [13, 18] → [_, 9, 9]

Show answer

Answer: Row3[1]=4, Row1[1]=31

SubType
number-pyramid
Difficulty
starter
Levels
  • [31]
  • [13,18]
  • [4,9,9]
Base
  • 4
  • 9
  • 9
TopValue
31
HiddenCells
  • {"r":2,"c":0,"v":4}
  • {"r":0,"c":0,"v":31}

Number Pyramid: Each block equals the sum of the two blocks below it. Fill the missing values. Pyramid (top to bottom): [17] → [10, 7] → [_, _, 2]

Show answer

Answer: Row3[1]=5, Row3[2]=5

SubType
number-pyramid
Difficulty
starter
Levels
  • [17]
  • [10,7]
  • [5,5,2]
Base
  • 5
  • 5
  • 2
TopValue
17
HiddenCells
  • {"r":2,"c":0,"v":5}
  • {"r":2,"c":1,"v":5}

Number Pyramid: Each block equals the sum of the two blocks below it. Fill the missing values. Pyramid (top to bottom): [25] → [9, 16] → [_, _, 10]

Show answer

Answer: Row3[2]=6, Row3[1]=3

SubType
number-pyramid
Difficulty
starter
Levels
  • [25]
  • [9,16]
  • [3,6,10]
Base
  • 3
  • 6
  • 10
TopValue
25
HiddenCells
  • {"r":2,"c":1,"v":6}
  • {"r":2,"c":0,"v":3}