All 100 targets have a solution.
\(1 = ( 449 \cdot 0 )!\)
\(2 = \sqrt{\frac{ 40 - 4 }{ 9 }}\)
\(3 = \sqrt{49 - 40 }\)
\(4 = \frac{ 40 - 4 }{ 9 }\)
\(5 = 49^{0} + 4 \)
\(6 = \sqrt{49 - 40 }!\)
\(7 = \frac{ 40 }{ 4 } - \sqrt{9 }\)
\(8 = \frac{ 40 }{ 9 - 4 }\)
\(9 = 49 - 40 \)
\(10 = 44^{0} + 9 \)
\(11 = \frac{ 40 }{ \sqrt{4} } - 9 \)
\(12 = \frac{ 40 - 4 }{ \sqrt{9 } }\)
\(13 = \frac{ 40 }{ 4 } + \sqrt{9 }\)
\(14 = \sqrt{( 40 + 9 ) \cdot 4 }\)
\(15 = \sqrt{40 - 4} + 9 \)
\(16 = ( 0 \cdot 9 + 4 ) \cdot 4 \)
\(17 = 0 + 4 + 4 + 9 \)
\(18 = \sqrt{( 40 - 4 ) \cdot 9 }\)
\(19 = \frac{ 40 }{ 4 } + 9 \)
\(20 = ( 9 - ( 0 + 4 ) ) \cdot 4 \)
\(21 = ( 4 - 0! ) \cdot \sqrt{49 }\)
\(22 = 40 - \sqrt{4} \cdot 9 \)
\(23 = 4! - 49^{0 }\)
\(24 = ( \frac{ 40 - 4 }{ 9 } )!\)
\(25 = 40 - 4! + 9 \)
\(26 = 49 + 0! - 4 !\)
\(27 = 40 - 4 - 9 \)
\(28 = \sqrt{40 + 9} \cdot 4 \)
\(29 = \frac{ 40 }{ \sqrt{4} } + 9 \)
\(30 = \sqrt{904 - 4 }\)
\(31 = \sqrt{40^{\sqrt{4}}} - 9 \)
\(32 = ( 9 - 4^{0} ) \cdot 4 \)
\(33 = 40 - \sqrt{49 }\)
\(34 = 40 - \sqrt{4 \cdot 9 }\)
\(35 = 40 + 4 - 9 \)
\(36 = 44 + 0! - 9 \)
\(37 = 4^{0} + 4 \cdot 9 \)
\(38 = 40 + 4 - \sqrt{9 }!\)
\(39 = 40 - 4 + \sqrt{9 }\)
\(40 = ( 4 - \sqrt{9} ) \cdot 40 \)
\(41 = 40 + 4 - \sqrt{9 }\)
\(42 = 40 - 4 + \sqrt{9 }!\)
\(43 = 44 - 9^{0 }\)
\(44 = 0 \cdot 9 + 44 \)
\(45 = 40 - 4 + 9 \)
\(46 = 90 - 44 \)
\(47 = 40 + \sqrt{49 }\)
\(48 = 49 - 4^{0 }\)
\(49 = 0 \cdot 4 + 49 \)
\(50 = 4^{0} + 49 \)
\(51 = 40 + \sqrt{4} + 9 \)
\(52 = 4 \cdot \sqrt{9} + 40 \)
\(53 = 40 + 4 + 9 \)
\(54 = 94 - 40 \)
\(55 = 40 + 4! - 9 \)
\(56 = ( 0! + 4 + 9 ) \cdot 4 \)
\(57 = \frac{ 90 + 4! }{ \sqrt{4 } }\)
\(58 = \sqrt{4} \cdot 9 + 40 \)
\(59 = 4 \cdot 9 - 0! + 4 !\)
\(60 = \frac{ 40 }{ 4 } \cdot \sqrt{9 }!\)
\(61 = 40 + 4! - \sqrt{9 }\)
\(62 = ( 40 - 9 ) \cdot \sqrt{4 }\)
\(63 = ( 4 - 0! + 4 ) \cdot 9 \)
\(64 = 4^{4 - 9^{0 }}\)
\(65 = 4^{0} + 4^{\sqrt{9 }}\)
\(66 = 90 - \sqrt{4 \cdot 4 }!\)
\(67 = 40 + 4! + \sqrt{9 }\)
\(68 = 90 - 4! + \sqrt{4 }\)
\(69 = \frac{ 90 }{ \sqrt{4} } + 4 !\)
\(70 = 90 - 4! + 4 \)
\(71 = 40 \cdot \sqrt{4} - 9 \)
\(72 = ( 0 + 4 + 4 ) \cdot 9 \)
\(73 = 40 + 4! + 9 \)
\(74 = 90 - 4 \cdot 4 \)
\(75 = ( 4^{0} + 4! ) \cdot \sqrt{9 }\)
\(76 = 4 \cdot 9 + 40 \)
\(77 = 40 \cdot \sqrt{4} - \sqrt{9 }\)
\(78 = 90 - \frac{ 4! }{ \sqrt{4 } }\)
\(79 = 9^{0 + \sqrt{4}} - \sqrt{4 }\)
\(80 = ( 9 - 4 )! - 40 \)
\(81 = ( 4 - 9^{0} )^{4 }\)
\(82 = 90 - 4 - 4 \)
\(83 = 40 \cdot \sqrt{4} + \sqrt{9 }\)
\(84 = 90 - 4 - \sqrt{4 }\)
\(85 = 9^{0 + \sqrt{4}} + 4 \)
\(86 = 90 - \sqrt{4 \cdot 4 }\)
\(87 = ( 0 + 4 ) \cdot 4! - 9 \)
\(88 = 90 - 4 + \sqrt{4 }\)
\(89 = 40 + 49 \)
\(90 = \frac{ 40 }{ 4 } \cdot 9 \)
\(91 = \frac{ 4 }{ 4 } + 90 \)
\(92 = 90 - \sqrt{4} + 4 \)
\(93 = 94 - 4^{0 }\)
\(94 = 0 \cdot 4 + 94 \)
\(95 = 4^{0} + 94 \)
\(96 = 90 + \sqrt{4} + 4 \)
\(97 = 94 - 0! + 4 \)
\(98 = 90 + 4 + 4 \)
\(99 = 94 + 0! + 4 \)
\(100 = ( 49 + 0! ) \cdot \sqrt{4 }\)