Question

(1) 14 + ____ + 29 = ____ + 50 + ____

(2) 13 × _____ = 49 × 13

(3) 1 = 1 × 1

121 = 11 × 11

12321 = 111 × 111

1234321 = _____ × _____.

(4) An angle which measures _____ to _____ is considered as an Obtuse Angle.

(5) 15 × 2 + 5 = 35

15 × 3 + 5 = _____

15 × __ + 5 = 65​

Answer 1

14 + 50+29 = 14+50+29

13×49=49×13

1234321=1111×1111

91° to 180°

15x3+5= 50

15x4+5=65

Answer 2

All the given questions are related to mental math which means we have to solve the given questions by just using our brain without using a pen and paper.

(1) 14 + ____ + 29 = ____ + 50 + ____

14 + 50 + 29 = 14 + 50 + 29 (just check the LHS and RHS of the given numbers then write the numbers that are not there from LHS to RHS and vice-versa)

(2) 13 × _____ = 49 × 13

13 × 49 = 49 × 13 (just check the LHS and RHS of the given numbers then write the numbers that are not there from LHS to RHS and vice-versa)

(3) 1 = 1 × 1

     121 = 11 × 11

     12321 = 111 × 111

     1234321 = 1111 × 1111

(4) An angle which measures 91° to 180° is considered as an Obtuse Angle.

(5) 15 × 2 + 5 = 35

     15 × 3 + 5 = 50

     15 × 4 + 5 = 65​