51. 

If the number 97215 * 6 is completely divisible by 11, then the smallest whole number in place of * will be:

A. 3
B.

2

C.

1

D.

5


52. 

476 ** 0 is divisible by both 3 and 11. The non-zero digits in the hundred's and ten's places are respectively:

A. 7 and 4
B.

7 and 5

C.

8 and 5

D.

None of these


53. 

If the number 5 * 2 is divisible by 6, then * = ?

A. 2
B.

3

C.

6

D.

7


54. 

(112 + 122 + 132 + ... + 202) = ?

A. 385
B. 2485
C. 2870
D. 3255

55. 

9 + 3 + 7 + 2 - 9 + 1 = ?
4 17 15

A.
7 + 719
1020
B.
9 + 817
1020
C.
9 + 719
1020
D.
7 + 817
1020