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111. 

Which one of the following can't be the square of natural number ?

A. 32761
B.

81225
C.

42437
D.

20164
112. 

(22 + 42 + 62 + ... + 202) = ?

A. 770
B. 1155
C. 1540
D. 385 x 385
113. 

35 + 15 x 1.5 = ?
A. 85
B. 51.5
C. 57.5
D. 5.25
114. 

The sum of first 45 natural numbers is:

A. 1035
B.

1280
C.

2070
D.

2140
115. 

854 x 854 x 854 - 276 x 276 x 276 = ?
854 x 854 + 854 x 276 + 276 x 276

A. 1130
B. 578
C. 565
D. 1156