PUZZLE ONLINE TEST

PUZZLE 1

1)235
2)335
3)535
4)435

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Solution:435 5*2+5=15; 15*2+5=35; . . . 215*2+5=435

PUZZLE 2

1)16
2)24
3)30
4)45

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Solution:30 n(n+1)(2n+1)/6 =(4*5*9)/6 =30

PUZZLE 3

1)245
2)235
3)225
4)205

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SOLUTION:205 SINCE 2+2^2=6; 6+3^2=15; 15+4^2=31; . . . 141+8^2=205;

PUZZLE 4

1)205
2)105
3)505
4)435

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SOLUTION:105 2^2=4+1=5; 4^2=16+2=18; 6^2=36+3=39; 8^2=64+4=68; 10^2=100+5=105;

PUZZLE 5:

1)2
2)5
3)6
4)8

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SOLUTION:8 ADD TO NUMBER IN COLUMN AND DIVIDE BY 2 TO GET THE THIRD COLUMN

PUZZLE 6:

1)14
2)35
3)15
4)13

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SOLUTION:14 SINCE 6*3/2=9; 5*8/2=20; 4*7/2=14;

PUZZLE 7

1)21
2)-11
3)-21
4)41

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Solution:-21 6*(7-5)=12; 8*(7-2)=40; 7*(2-5)=-21;

PUZZLE 8

1)5
2)3
3)8
4)7

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SOLUTION:7 3+3-1=5; 4+4-1=7; 5+5-1=9;

PUZZLE 9

1)0
2)5
3)1
4)4

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SOLUTION:0 add the equal end digits and subtract with one 15+2-1=16; 10+16-1=25; 9+25-1=33; similarly x+3-1=2; x=3-3=0; Answer:0

PUZZLE 10

1)2
2)3
3)5
4)4

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SOLUTION:2 Subtract the last digit and first digit to get the middle digit 9-5=4; 8-7=1; 11-9=2;