Across

1 A prime number
3 A square number
5 1 down plus six
7 21 down minus nine
8 2 down minus fifty-four
9 13 down plus 196
11 Across Six times 3
13 Across Six times 22
15 10 down minus five
16 15 across plus nineteen
17 22 down plus eighty-eight
20 11 across minus 116
22 23 down minus sixty-five
24 18 down plus 945
25 5 down plus 909
27 1 across plus twenty-six
28 12 down minus 196
29 26 down minus fifty

Down

1 24 down plus four
2 21 down times three
3 27 across times two
4 29 across times three
5 21 down five times
6 5 across plus twenty-one
10 29 across minus five
11 6 down times nine
12 3 down times four
13 1 across twelve times
14 4 down times five
18 8 across plus ninety-one
19 16 across minus twenty-three
21 A square number
22 A square number
23 22 down plus twenty-two
24 A prime number
26 24 down Two times