starter Set 99 Form Exercise

Number Pyramid: Each block equals the sum of the two blocks below it. Fill the missing values. Pyramid (top to bottom): [20] → [_, 9] → [5, 6, _]

Show answer

Answer: Row2[1]=11, Row3[3]=3

SubType
number-pyramid
Difficulty
starter
Levels
  • [20]
  • [11,9]
  • [5,6,3]
Base
  • 5
  • 6
  • 3
TopValue
20
HiddenCells
  • {"r":1,"c":0,"v":11}
  • {"r":2,"c":2,"v":3}

Number Pyramid: Each block equals the sum of the two blocks below it. Fill the missing values. Pyramid (top to bottom): [22] → [12, 10] → [_, _, 2]

Show answer

Answer: Row3[1]=4, Row3[2]=8

SubType
number-pyramid
Difficulty
starter
Levels
  • [22]
  • [12,10]
  • [4,8,2]
Base
  • 4
  • 8
  • 2
TopValue
22
HiddenCells
  • {"r":2,"c":0,"v":4}
  • {"r":2,"c":1,"v":8}

Number Pyramid: Each block equals the sum of the two blocks below it. Fill the missing values. Pyramid (top to bottom): [_] → [19, _] → [9, 10, 4]

Show answer

Answer: Row1[1]=33, Row2[2]=14

SubType
number-pyramid
Difficulty
starter
Levels
  • [33]
  • [19,14]
  • [9,10,4]
Base
  • 9
  • 10
  • 4
TopValue
33
HiddenCells
  • {"r":0,"c":0,"v":33}
  • {"r":1,"c":1,"v":14}

Number Pyramid: Each block equals the sum of the two blocks below it. Fill the missing values. Pyramid (top to bottom): [37] → [_, 20] → [7, _, 10]

Show answer

Answer: Row2[1]=17, Row3[2]=10

SubType
number-pyramid
Difficulty
starter
Levels
  • [37]
  • [17,20]
  • [7,10,10]
Base
  • 7
  • 10
  • 10
TopValue
37
HiddenCells
  • {"r":1,"c":0,"v":17}
  • {"r":2,"c":1,"v":10}