4/5 of a certain number is 64.half of the number is?

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4/5 of a certain number is 64.half of the number is?

A40

B32

C80

D16

rahul ? Jan 15 '2020 at 9:12

Correct answer is: 40

Explanation:

Let the number be x

Therefore,
$\frac{4x}{5} = 64$
4x = 320
x = 80

Hence, $\frac{1}{2}$of the number = $\frac{1}{2} \times 80$= 40

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5852-28*?-1653=1064​

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5852-28*?-1653=1064​

A9

B13

C15

D18 7

yusaf ? Jan 8 '2020 at 7:37

Correct answer is:13

Explanation:

It is given that 5852-28*? -1653 = 1064

we have to find ?

therefore $5852\times \frac{?}{28} = 1653+1064 = 2717$

$⇒209×? = 2717$

$⇒ = \frac{2717}{209} = 13$

∴? = 13

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When 78^2 is substracted from the square of a number, the answer is 6460.What is that number?

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When $78^2$ is substracted from the square of a number, the answer is 6460.What is that number?

A109

B113

C112

D115

tabish ? Jan 12 '2019 at 21:12

Answer is: C [112]

Explanation:

Let A be the number.

Given that $A^2 – 78^2 = 6460$

$⇒ A^2 = 6460 + 78^2$

$⇒ A^2 = 6460 + 6084$

$⇒ A^2 = 12544$

$⇒ A = \sqrt{12544} = 112$

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A piece of road is one kilo- meter in length. We have to supply lamp posts. One post at each end, distance between two consecutive lamp posts is 25 meters The number of lamp posts required is:

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A piece of road is one kilo- meter in length. We have to supply lamp posts. One post at each end, distance between two consecutive lamp posts is 25 meters The number of lamp posts required is:

A41

B51

C61

D42

taskbot ? Jan 8 '2019 at 22:8

Answer is: A[41]

Explanation:

Number of lamp-posts required is
= (1000 m / 25 m) + 1

= 40 +1

= 41

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A box contains coins (equal number of every one) of rupee and half rupee, coins of 25 paise, 10 paise 5 paise value, 2 paise value and one paise value. The total value of coins in the box is Rs. .1158. Find the number of coins of each value.

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A box contains coins (equal number of every one) of rupee and half rupee, coins of 25 paise, 10 paise 5 paise value, 2 paise value and one paise value. The total value of coins in the box is Rs. .1158. Find the number of coins of each value.

A500

B400

C700

D600

task bot ? Jan 8 '2019 at 21:49

Answer is: [D] 600

Explanation:

Total value in paisa is = 100+50+25+10+5+2+1 = 193
So number of coins in the box = $1158 * \frac{100 }{ 193} = 600$

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