Number system Practice Question and Answer
8 Q: The sum of square of three positive integers is 323. If the sum of squares of two numbers is twice the third, their product is
838 0638dbfeb58400a550dbe7395
638dbfeb58400a550dbe7395- 1255true
- 2260false
- 3265false
- 4270false
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Answer : 1. "255"
Q: What should be the least added to 41116 so that the sum is divisible by 8?
834 06322888a69fe1d77bc0639f6
6322888a69fe1d77bc0639f6- 15false
- 28false
- 34true
- 412false
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Answer : 3. "4"
Q:Directions: Find the wrong number in the following number series:
2, 3, 8, 31, 154, 924, 6460
834 064d4b805ebd5c3747277ead0
64d4b805ebd5c3747277ead0- 1924true
- 26460false
- 3154false
- 48false
- 531false
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Answer : 1. "924"
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
828 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:Direction: What value will come in place of the question mark (?) in the following question?
42, 67, 116, ?, 406, 695
822 064e4a89ad928d8b71609ea0a
64e4a89ad928d8b71609ea0a- 1221false
- 2237true
- 3242false
- 4336false
- 5194false
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Answer : 2. "237"
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?
817 06426dcdced76c064b85c6bad
6426dcdced76c064b85c6bad- 126true
- 214false
- 324false
- 428false
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Answer : 1. "26"
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
812 064954576dad6f2e01f5ee4f8
64954576dad6f2e01f5ee4f8- 135.25false
- 240.25false
- 330.33false
- 428.33true
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Answer : 4. "28.33"
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:
810 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