a2zinterviews

6.	The value of log2(log5625) is
	A.  2
	B.  5
	C.  10
	D.  15

Solution

Let log5625 = x. Then, 5x = 625 = 54 ‹=› x=4. Let log2( log5625) = y. Then, log 24= y ‹=› 2y= 4 y;2.

7.	The value of log5(1/ 125) is
	A.  3
	B.  -3
	C.  1/3
	D.  -1/3

Solution

Let log5(1/125) = n. Then, 5n= 1/125 ‹=›5n =5-3 n= -3.

8.	If logx y =100 and log2 x =10, then the values of y is
	A.  210
	B.  2100
	C.  21000
	D.  210000

Solution

log2 x = 10 x= 210 logx y = 100 y= x100 =(210)100 y‹=›21000

9.	Evaluate :log3 27
	A.  3
	B.  4
	C.  5
	D.  6

Solution

log3 27 = n =3n =27 =33 n‹=›3.

10.	If log√8 x = 3×1/3, find the value of x.
	A.  25
	B.  32
	C.  37
	D.  None of these

s

Solution

log√8 x = 10/3. x =( √8)10/3 =2( 3/2×10/3) =2 5 = 32.