10+ Difficult Maths Puzzles with Answers - 1

Ans: 115

59 + 5 + 9 = 73

73 + 7 + 3 = 83

83 + 8 + 3 = 94

94 + 9 + 4 = 107

107 + 1 + 7 = 115

Ans:120

( 5 x 4 x 3 x 2 x 1)

Ans: 37

The rule is to replace + - with -.

Thus 56 - 19 = 37.

Ans: 8

In each row multiply the first and third digits to obtain the number formed by the second and fourth digits.

Ans: 18

Multiply the bottom numbers to obtain the numbers at the top, albeit they are at the top of a different pyramid.