You can add 22 + 2.
(23-21) x 22-20
20 + [(21+23)/22]2 = 20 + [44/22]2 = 20 + 22 = 20 + 4 = 24
22 + 9 - 20 + 13 = 24
(22/4)x8-20=24
21+3 or using all the numbers: 21 + (3*(2-1))
21-2*2-14
22
21 22 23 24 which is the prime number
26*25*24*23*22*21*20*19 = 62,990,928,000
21 - 13 = 8... 9 - 6 = 3... 8 x 3 = 24
i think 21 or 22 i think 21 or 22 i think 21 or 22
22/24 - 21/24 = 1/24