Logarithm – Aptitude Questions and Answers | Online Logarithm MCQ Aptitude Test
Logarithm – Aptitude Questions and Answers | Online Logarithm MCQ Aptitude Test Quiz Name Logarithm Category Reasoning Number of Questions 15 Time 30... explore below more
10. 1/log3 60+1/log4 60+ 1/log5 60 is equal to: a. 0 b. 1 c. 5 d. 60
Answer: B
Explanation: Log60 3 + log60 4 + log60 5 = log60 (3 x 4 x 5) = log60 60 = 1 is the given equation.
11.The number of digits in 264 is: 11. If log 2 = 0.30103, the number of digits in 264 is: a. 18 b. 19 c. 20 d. 21
Answer: C
Explanation: (64 x 0.30103) = 19.26592 log (264) = 64 x log 2 = 64 x 0.30103) = 19.26592 log (264) = 64 x log 2 = 64 x 0.30103) =It has a 19th attribute.As a result, the total number of digits in 264 is 20.
12. If logx 9/16 = – 1/2, then x equals: a. -3/4 b. 3/4 c. 81/256 d. 256/81
Answer: D
Explanation: 9/16 logx = – 1/2 .x-1/2 = 9/16,1 = 9 root x = 16 x = 16/9 x = 16/9 x = 16/9 x = 16/9 x =square x = 16/9,x = 256/81 x = 256/81 x = 256/81.
13.If axe equals by, then:A a. log a/b =x/y b. log a/log b=x/y c. log a/log b=y/x d. None of these
Answer: C
Explanation: by = ax,log ax = log by,x log a = y log b = x log a + y log b = x log a,y/x = log a/log b.
14. If logx y = 100 and log2 x = 10, the value of y is as follows: a. 210 b. 2100 c. 21000 d. 210000
Answer: C
Explanation: 210 log 2 x = 10 log 2 x = 10 log 2 x = 10 log 2 x = 10 log 2 x =100 logx y ,x100 = y,(210)100; y = (210)100; y = (210)100; [insert x’s value]=21000 is the value of y.
15. The value of log2 16 is as follows: a. 1/8 b. 4 c. 8 d. 16
Answer: B
Explanation: Let’s say log2 16 equals n.Then 2n = 16 = 24 n = 4 is the result.16 log2 = 4.