Number system Practice Question and Answer
8 Q: 1! + 2! + 3! + 4! + ......... + 50! Find the unit digit of?
702 0631832a12d4ba278b6662521
631832a12d4ba278b6662521- 11false
- 23true
- 35false
- 48false
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Answer : 2. "3"
Q: If the 8 digit number 789x531y is divisible by 72, then the value of (5x - 3y) will be?
787 0631830eed9ac741324d7846c
631830eed9ac741324d7846c- 10false
- 2-1true
- 32false
- 41false
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Answer : 2. "-1"
Q: When a number is divided by 192 the remainder is 54. What will be the remainder when the same number is divided by 16?
704 063183079d9ac741324d7840b
63183079d9ac741324d7840b- 12false
- 24false
- 36true
- 48false
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Answer : 3. "6"
Q: For which value of x the seven-digit number 8439x53 is divisible by 99?
837 0631830382d4ba278b6660ff1
631830382d4ba278b6660ff1- 19false
- 24true
- 33false
- 46false
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Answer : 2. "4"
Q: In an examination, a student was asked to find 3/11 of a certain number, by mistake, he found 3/4 of it. His answer was 315 more than the correct answer. The given number is –
1467 06082c8105027727e2faba1df
6082c8105027727e2faba1df- 1629false
- 2660true
- 3617false
- 4576false
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Answer : 2. "660"
Q: The product of the zeroes of the quadratic polynomial x2+7x+ 10 is
698 063108e9cd9ac741324b7c0e4
63108e9cd9ac741324b7c0e4- 112false
- 210true
- 332false
- 442false
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Answer : 2. "10"
Q: What is the smallest digit that must be added to the product 5786 × 5784 to make it a perfect square?
861 0630ded3f4e3bf85cbe748a92
630ded3f4e3bf85cbe748a92- 11false
- 26false
- 35true
- 44false
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Answer : 3. "5"
Q: When (6767 +67) is divided by 68, the remainder is-
966 06303364629cb46304423ee34
6303364629cb46304423ee34- 113false
- 263false
- 366true
- 467false
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Answer : 3. "66"
Explanation :
(6767+ 67) = 67(6766 + 166)
As 66 is an even number
We know 6766 is an even number
We know (6766 + 1) is perfectly divisible by (67 + 1)
i.e. 68
We know The remainder = 66
(6767+ 67) = 67(6766 + 166)

