Number System
- Sum of two numbers is 40 and their product is 375. What will be the sum of their reciprocals?
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Let x and y be the two numbers. Then,
xy = 375 and x + y = 40∴ Sum of reciprocals = x + y xy = 40 = 8 375 75 Correct Option: A
Let x and y be the two numbers. Then,
xy = 375 and x + y = 40∴ Sum of reciprocals = x + y xy = 40 = 8 375 75
- The value of
1 + 1 
1 + 1 1 + 1 ........ 1 + 1 2 3 4 120
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2 + 1 3 + 1 4 + 1 ........ 120 + 1 2 3 4 120 = 3 × 4 × 5 ×......× 121 2 3 4 120 = 121 = 60.5 2 Correct Option: C
2 + 1 3 + 1 4 + 1 ........ 120 + 1 2 3 4 120 = 3 × 4 × 5 ×......× 121 2 3 4 120 = 121 = 60.5 2
- If
then the value of51.84 = 12, 4.32 0.005184 is 0.432
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51.84 = 5184 = 12 4.32 432 ∴ 0.005184 = 5184 × 1 0.432 432 1000 = 12 = 0.012 1000 Correct Option: B
51.84 = 5184 = 12 4.32 432 ∴ 0.005184 = 5184 × 1 0.432 432 1000 = 12 = 0.012 1000
- The value of (0.63 + 0.37) is
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Expression = 0.63 + 0.37
= 63 + 37 = 100 99 99 99 Correct Option: B
Expression = 0.63 + 0.37
= 63 + 37 = 100 99 99 99
- The value of 0.2 + 0.3 + 0.32 is :
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0.2 + 0.3 + 0.32
= 2 + 3 + 33 9 9 99 = 22 + 33 + 32 + 87 = 0.87 99 99 Correct Option: A
0.2 + 0.3 + 0.32
= 2 + 3 + 33 9 9 99 = 22 + 33 + 32 + 87 = 0.87 99 99
