Solve the puzzles

Solve the puzzles :

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1.
1+4=5
2+5=12
3+6=21
8+11=?

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2.
11 * 11= 4
22 * 22 = 16
33 * 33 = ?

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3.
48 / 2 (9+3) =?

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4.
9=72
8=56
7=42
6=30
5=20
3=?

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5.
1=2
2=10
3=30
4=68
5 =?

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6.
7 * 7 = 12
5 * 5 = 8
3 * 3 = 4
2 * 2 = 2
6 * 6 = ?

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7.
8801 = 5
5261 = 1
9632 = 2
6381 = 3
6321 = ?

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8.
1 + 4 = 10
2 + 8 = 20
4 + 16 = 40
8 + 32 = ?

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9.
2 = 6
3 = 12
4 = 20
5 = 30
9 = ??

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10.
1 = 5
2 = 25
3 = 325
4 = 4325
5 = ?

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