On adding 4 to a number, it becomes a perfect square and if we add 29 to it, it becomes a perfect cube. Find t

Look at your perfect squares and perfect cubes and work backwards.
squares: 4 9 16 25 36 49 64 81 100
cubes: 8 27 64 125

subtract 4 from squares and add 29 until you get a cube

96 + 4 = 100
96 + 29 = 125

t=96

the number is 96

if u add 4 ==> 96+4 = 100 = 10squre

if u add 29 ==> 96+29 = 125 = 5 cube

96