Number System Questions Practice Question and Answer
8 Q:Directions: Find the wrong number in the following number series:
2, 3, 8, 31, 154, 924, 6460
878 064d4b805ebd5c3747277ead0
64d4b805ebd5c3747277ead0- 1924true
- 26460false
- 3154false
- 48false
- 531false
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Answer : 1. "924"
Q: A number when divided by 6 leaves remainder 3. When the square of the same number is divided by 6, the remainder is :
877 0650d36e3d2f211504875ecda
650d36e3d2f211504875ecda- 10false
- 21false
- 32false
- 43true
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Answer : 4. "3"
Explanation :
The remainder will be same.
On dividing 9 by 6, remainder = 3
On dividing 81 by 6, remainder = 3
Q: There are two numbers such that the first number is four times of the second mumber. If their average is 65, then what is the second number?
869 06426dcdced76c064b85c6bad
6426dcdced76c064b85c6bad- 126true
- 214false
- 324false
- 428false
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Answer : 1. "26"
Q: In a question on division, the divisor is 7 times the quotient and 3 times the remainder. If the remainder is 28, then the dividend is
862 0650d3f3f73357650645d20e3
650d3f3f73357650645d20e3- 1588false
- 2784false
- 3823false
- 41036true
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Answer : 4. "1036"
Explanation :
Let the quotient be Q and the remainder be R. Then
Divisor = 7 Q = 3 R
∴ Divisor = 7 Q = 7 × 12 = 84
Dividend = Divisor × Quotient + Remainder = 84 × 12 + 28 = 1008 + 28 = 1036
Q: Find the mode for the given distribution (rounded off to two decimal places)
Class 5-10 10-15 15-20 20-25 25-30 30-35
Interval Frequency 8 7 6 9 11 10
861 064954576dad6f2e01f5ee4f8
64954576dad6f2e01f5ee4f8- 135.25false
- 240.25false
- 330.33false
- 428.33true
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Answer : 4. "28.33"
Q: What should be the least added to 41116 so that the sum is divisible by 8?
860 06322888a69fe1d77bc0639f6
6322888a69fe1d77bc0639f6- 15false
- 28false
- 34true
- 412false
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Answer : 3. "4"
Q: Which of the following statements is a false statement?
(A) CRT The monitor is the thinnest monitor.
(B) Dot matrix is the fastest computer.
(C) CAG memory is slower than the main memory.
(D) Bar code reader is an input device.
850 064b920e8568e7ff594be2e6b
64b920e8568e7ff594be2e6b- 1a and bfalse
- 2a, b and ctrue
- 3c and dfalse
- 4a and dfalse
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Answer : 2. "a, b and c"
Explanation :
All statements are true.
- CRT The monitor is the thinnest monitor.
- Dot matrix is the fastest computer.
- CAG memory is slower than the main memory.
Q: Two positive numbers differ by 1280. When the greater number is divided by the smaller number, the quotient is 7 and the remainder is 50. The greater number is:
849 064bfb2f4e2108a7239492d0d
64bfb2f4e2108a7239492d0d- 11558false
- 21458false
- 31585false
- 41485true
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Answer : 4. "1485"
Explanation :
Given :- Two positive numbers differ by 1280
When the greater number is divided by the smaller number The quotient is 7 and the remainder is 50
Concept :- Dividend = Quotient × divisor + remainder
Calculation :- Let greater number = a and Smaller number = b From question, ⇒ a - b = 1280 ....(1) Again from question, ⇒ a = 7b + 50 ....(2)
Put the value of a from equation (2) into equation (1) ⇒ 7b + 50 - b = 1280 ⇒ 6b = 1280 - 50 ⇒ 6b = 1230 ⇒ b = (1230/6) ⇒ b = 205
Put the value of b in equation (1) ⇒ a - 205 = 1280 ⇒ a = 1280 + 205 ⇒ a = 1485 ⇒ Greater number = 1485 ∴ Greater number is 1485