Numbers - General Questions (16)
| 121. | 72519 x 9999 = ? |
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Answer: Option A Explanation:
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| 122. | (12)3 x 64 ÷ 432 = ? |
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Answer: Option A Explanation: Given Exp. =(12)3 x 64=(12)3 x 64= (12)2 x 62 = (72)2 = 518443212 x 62 |
| 123. | The difference of two numbers is 1365. On dividing the larger number by the smaller, we get 6 as quotient and the 15 as remainder. What is the smaller number ?
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Answer: Option B Explanation: Let the smaller number be x. Then larger number = (x + 1365).
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x + 1365 = 6x + 15
5x = 1350| 124. | The sum of first five prime numbers is: |
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Answer: Option D Explanation: Required sum = (2 + 3 + 5 + 7 + 11) = 28. Note: 1 is not a prime number. Definition: A prime number (or a prime) is a natural number that has exactly two distinct natural number divisors: 1 and itself. |
| 125. | 5358 x 51 = ? |
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Answer: Option A Explanation:
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| 126. | What is the unit digit in {(6374)1793 x (625)317 x (341491)}? |
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Answer: Option A Explanation: Unit digit in (6374)1793 = Unit digit in (4)1793 = Unit digit in [(42)896 x 4] = Unit digit in (6 x 4) = 4 Unit digit in (625)317 = Unit digit in (5)317 = 5 Unit digit in (341)491 = Unit digit in (1)491 = 1 Required digit = Unit digit in (4 x 5 x 1) = 0. |
| 127. | Which of the following is a prime number ? |
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Answer: Option D Explanation: Clearly, 97 is a prime number.
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| 128. | The largest 4 digit number exactly divisible by 88 is: |
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Answer: Option A Explanation: Largest 4-digit number = 9999
88) 9999 (113
88
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119
88
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319
264
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55
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Required number = (9999 - 55)
= 9944. |