1
Number Pyramid: Each block equals the sum of the two blocks below it. Fill the missing values. Pyramid (top to bottom): [87] → [_, _] → [_, 21, 13] → [18, _, _, _] → [_, 9, 5, 2, _] =
2
Number Pyramid: Each block equals the sum of the two blocks below it. Fill the missing values. Pyramid (top to bottom): [_] → [_, 39] → [_, 21, _] → [_, 10, _, 7] → [5, _, _, 2, 5] =
3
Number Pyramid: Each block equals the sum of the two blocks below it. Fill the missing values. Pyramid (top to bottom): [_] → [_, _] → [32, _, 21] → [17, 15, _, _] → [8, _, _, 6, 3] =
4
Number Pyramid: Each block equals the sum of the two blocks below it. Fill the missing values. Pyramid (top to bottom): [63] → [_, 39] → [_, _, 22] → [_, _, _, _] → [1, _, 4, 8, 2] =