1. A decimal number has 16 decimal places. The number of decimal places in the square root of this number will be:
(a) 7
(b) 4
(c) 8
(d) 16

2. If a four-digited perfect square number is such that the number formed by the first two digits and the number formed by the last two digits are also perfect squares, then the four digited number is:
(a) 5625
(b) 3616
(c) 1681
(d) 1024

3. Two numbers are in the ratio of 9 : 7. If the difference of their squares is 288, then the smaller of the number is:
(a) 21
(b) 23
(c) 27
(d) 28

4. Find the value of x, if 5^{x – 3} . 3^{2x – 8} = 225.
(a) 3
(b) 4
(c) 5
(d) None of these

5. If 9^{2x – 1} = 27^{x + 2}, then x is equal to
(a) 2
(b) 4
(c) 8
(d) 16

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