![21, 20, ?, 4, 53, -28](https://www.gkseries.com/blog/wp-content/uploads/2024/03/21-20-4-53-28.jpg)
21, 20, ?, 4, 53, -28
A.60
B.4
C.40
D.29
E.36
Sol:
21 -12 = 20
20 + 32 = 29
29 – 52 = 4
4 + 72 = 53
53 – 92 = -28
21, 20, ?, 4, 53, -28
A.60
B.4
C.40
D.29
E.36
Sol:
21 -12 = 20
20 + 32 = 29
29 – 52 = 4
4 + 72 = 53
53 – 92 = -28
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