Maths Practice Question and Answer

Q:

‘SECOND’ शब्द के अक्षरों को कितने अलग-अलग तरीकों से व्यवस्थित किया जा सकता है?

3861 0

  • 1
    720
    Correct
    Wrong
  • 2
    120
    Correct
    Wrong
  • 3
    5040
    Correct
    Wrong
  • 4
    270
    Correct
    Wrong
  • 5
    इनमें से कोई नहीं
    Correct
    Wrong
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Answer : 1. "720"
Explanation :

Number of letter in word ‘SECOND’ =6
The number of ways can the letters of word be arranged =6×5×4×3×2×1=720

Q: What is 7 + 7 ÷ 7 + 7 × 7 - 7 = 4051 0

  • 1
    0
    Correct
    Wrong
  • 2
    42
    Correct
    Wrong
  • 3
    50
    Correct
    Wrong
  • 4
    57
    Correct
    Wrong
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Answer : 3. "50"
Explanation :

Answer: C) 50 Explanation: Given 7 + 7/7 + 7 x 7 - 7 By using BODMAS rule, 7 + 1 + 7 x 7 - 7 = 8 + 49 - 7 = 57 - 7 = 50.   Hence 7 + 7/7 + 7 x 7 - 7 = 50.

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Answer : 4. "8:3"
Explanation :

Answer: D) 8:3 Explanation: Let the speed of the boat upstream be p kmph and that of downstream be q kmph   Time for upstream = 8 hrs 48 min = 845hrs   Time for downstream = 4 hrs   Distance in both the cases is same.   => p x  845= q x 4   => 44p/5 = 4q   => q = 11p/5    Now, the required ratio of Speed of boat : Speed of water current   = q+p2:q-p2   => (11p/5 + p)/2  : (11p/5 - p)/2   => 8 : 3

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Answer : 4. "10,500"
Explanation :

Answer: D) 10,500 Explanation: The ratio of their investments:50000x36 : 80000x30 = 3 : 4Simran's share of profit = (24500x3/7) = Rs.10,500.

Q: यदि छात्र 3 घंटे के लिए रसायन विज्ञान का अध्ययन करता है, तो वह भूगोल का अध्ययन करता है 2159 0

  • 1
    1 घंटा
    Correct
    Wrong
  • 2
    2 घंटा
    Correct
    Wrong
  • 3
    1 घंटा 30 मिनट
    Correct
    Wrong
  • 4
    2 घंटा 30 मिनट
    Correct
    Wrong
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Answer : 2. "2 घंटा"

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Answer : 2. "60"

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