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41.
A number when divided by 3 leaves a remainder 1. When the quotient is divided by 2, it leaves a remainder 1. What will be the remainder when the number is divided by 6?
- A.2
- C.4
- B.3
- D.5
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Let n = 3q + 1 and let q = 2p + 1. Then, n = 3 (2p + 1) + 1 = 6p + 4 | |||
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42.
935421 x 625 = ?
- A.575648125
- C.584649125
- B.584638125
- D.585628125
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
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43.
The sum of the digits of a 3-digit number is subtracted from the number. The resulting number is :
- A.Divisible by 6
- C.Divisible neither by 6 nor by 9
- B.Divisible by 9
- D.Divisible by both 6 and 9
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| Let the 3-digit number be xyz. Then, |
| (100x + 10y + z) - (x + y + z) = 99x + 9y = 9 (11x + y), Which is divisible by 9. |
44.
Which of the following is always odd?
- A.Sum of two odd numbers
- C.Product of two odd numbers
- B.Difference of two odd numbers
- D.None of these
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Product of two odd numbers is always odd. |
45.
The digit in unit's place of the product 81 x 82 x … x 89 is :
- A.0
- C.6
- B.2
- D.8
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| Required digit = Unit digit in (1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9) = 0. |
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