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What is meant by odd number? Give example.

Solution: Odd numbers are not divisible by 2. Example 1, 3, 5, 7 are odd numbers. An odd number is a number which cannot be divided into 2 equal... View Article

The product of two numbers is 6300 and their HCF is 15. How many pairs of such numbers are there?

(a) 2 (b) 6 (c) 10 (d) 3 Solution: Let x and y be the numbers. Product = xy = 6300 HCF = 15 So let x = 15a and y = 15b =>... View Article

Complete the sequence: ab_ bc_ c_b a_c.

(a) baac (b) aabb (c) caab (d) aaab Solution: Given sequence is ab_ bc_ c_b a_c. The pattern is abc bca cab abc Hence option... View Article

How many factors of 7560 are perfect square?

Solution: The factors of 7560 are 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 54, 56, 60, 63,... View Article

What is the equivalent decimal of binary number 101110.

Solution: Given binary number is 101110. To convert binary number to decimal, multiply each digit of the binary number by the corresponding... View Article

Convert the following decimal into binary (a) 158 (b) 27.5.

Solution: (a) Given number is 158. To convert a decimal number to binary, we divide it successively by 2, until quotient is 0. 158/2 =... View Article

Square root of 363

(a) 3√11 (b) 11√3 (c) 11√2 (d) none of these Solution: We have to find the square root of 363. 363 is not a perfect... View Article

Determine the value of c such that the line joining (0,3), (5,-2) is a tangent to the curve y = c/(x+1).

(a) 4 (b) 3 (c) 23 (d) 1 Solution: Given y = c/(x+1) dy/dx = -c/(x+1)2 m = (y2-y1)/(x2-x1) = (-2-3)/5 = -1 Equation of the... View Article

Write USD 11,800.00 (Dollars) in words.

Solution: We can write 11,800.00 Dollars as eleven thousand eight hundred Dollars.... View Article

Find the 68th multiple of 89, if the 69th multiple is 6141.

(a) 6230 (b) 5963 (c) 6052 (d) none of the above Solution: Given that 69th term = 6141 Common difference = 89 So 68th term =... View Article

What is 6% of 10000.

(a) 100 (b) 60 (c) 600 (d) 1000 Solution: 6% of 10000 = (6/100)10000 = 600 Hence option c is the answer.... View Article

Two amplifiers are connected one after another in series. The first amplifier has a voltage gain of 15 and the second has a voltage gain of 20. If the input signal voltage is 0.3 V, the output signal voltage is

Two amplifiers are connected one after another in series. The first amplifier has a voltage gain of 15 and the second has a voltage gain of 20.... View Article

Three rods of same dimensions have thermal conductivities k, 2k, and 3k. they are arranged as shown in figure with their ends at 100ºc, 40ºc and 0ºc. The temperature of the junction is

Three rods of the same dimensions have thermal conductivities of 3k, 2k and k. They are arranged as shown in the figure, with their ends at 100... View Article

An electromagnetic wave going through a vacuum is described by E=E₀sin(kx−ωt); B=B₀sin(kx−ωt).
Which of the following equation is true?

a) E0k = B0ω b) E0ω = B0k c) E0B0 = ωk d) None of these Answer: a) E0k = B0ω Solution:... View Article

A full-wave rectifier is used to convert n-Hz A.C into D.C., then the number of pulses per second present in the rectified voltage is.

a) n b) n/2 c) 2n d) 4n Answer: 2n Solution:... View Article