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1) If the number A381 is divisible by 11, then what is the value of A?
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2) Suppose a number 381A is divisible by 9, then what is the value of A?
Explanation :
A number is divisible by 9 if the sum of its digits is divisible by 9, e.g., 117. So, we have the number 381A.
Hence, 3 + 8 + 1 + A = multiple of 9
If we put A = 6, then we get
3 + 8 + 1 + 6 = 18 (which is a multiple of 9)
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3) Suppose there is a number 'n'. When 'n' is divided by 5, the remainder will be 2. What will be the remainder when n2 is divided by 5?
Explanation :
According to the question when 'n' is divided by 5, we will get the remainder 2
n/5 = remainder 2
On putting n =7, and on dividing it with 5 we will get remainder 2
So, n = 7, and n^2 = 49
(n^2)/5 = 49/5 = remainder 4
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4) If the difference between three times and seven times of a number is equal to 36, what will be the number?
Explanation :
Let the number be X.
So according to the question -
7X - 3X = 36
4X = 36
Or,
X = 36/4 = 9
So, the required number is 9.
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5) What will be the value of x, if 5^(x + 3) = 25^(3x - 4)?
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6) A light sensitive device that converts drawing, printed text or other images into digital form is
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7) Which protocol provides e-mail facility among different hosts?
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8) In order to tell Excel that we are entering a formula in cell, we must begin with an operator such as
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9) In how many generations a computer can be classified?
Explanation :
There is 5 generation of computer available till now.
1st Generation of Computer = The period of first generation: 1946-1959. Vacuum tube based.
2nd Generation of Computer = The period of second generation: 1959-1965. Transistor based.
3rd Generation of Computer = The period of third generation: 1965-1971. Integrated Circuit based.
4th Generation of Computer = The period of fourth generation: 1971-1980. VLSI microprocessor based.
5th Generation of Computer = The period of fifth generation: 1980-onwards. ULSI microprocessor based.
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10) Fifth generation computers are based on
Explanation :
Fifth generation computing devices, based on artificial intelligence, are still in development, though there are some applications, such as voice recognition, that are being used today. The use of parallel processing and superconductors is helping to make artificial intelligence a reality. Quantum computation and molecular and nanotechnology will radically change the face of computers in years to come. The goal of fifth-generation computing is to develop devices that respond to natural language input and are capable of learning and self-organization.
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