4
Q:

# A natural number when increased by 12 equals 160 times its reciprocal. Find the number?

 A) 20 B) 12 C) 8 D) 4

Explanation:

Let the required number be 'p'.

From the given data,

p + 12 = 160 x 1/p

=> p + 12 = 160/p

=> p(p + 12) = 160

=> P^2 + 12p - 160 = 0

=> p^2 + 20p - 8p - 160 = 0

=> P(p + 20) - 8(p + 20) = 0

=> (p + 20)(p - 8) = 0

=> p = -20 or p = 8

As, given the number is a natural number, so it can't be negative.

Hence, the required number p = 8.

Q:

The coefficient of x in

 A) 3y2 B) 27y2 C) -27y2 D) -3y2

Explanation:

0 333
Q:

The largest number which should replace * in the number 2365*4 to make the number divisible by 4 is:

 A) 9 B) 2 C) 0 D) 8

Explanation:

0 482
Q:

$43÷16×2-1=?$

 A) 3 B) -2 C) 8 D) 15

Explanation:

0 140
Q:

If

 A) 110 B) 10 C) 80 D) 140

Explanation:

0 239
Q:

Sum of four consecutive odd numbers is 328. Find the largest number.

 A) 85 B) 98 C) 79 D) 97

Explanation:

0 501
Q:

What is the smallest integer that is divisible by 3, 7 and 18?

 A) 63 B) 252 C) 72 D) 126

Explanation:

0 479
Q:

If the mean of the numbers 27 + x, 31 + x, 89 + x, 107 + x and 156 + x is 82.then the mean of 130 + x, 126 x, 68 + x, 50 + x 1 + x is :

 A) 80 B) 75 C) 50 D) 70

Explanation:

0 141
Q:

Arrange the following in the decreasing order?

(√23 – √21), (√19 – √17), (√21 – √19)

 A) (√23 – √21) > (√21 – √19) > (√19 – √17) B) (√23 – √21) > (√19 – √17) > (√21 – √19) C) (√19 – √17) > (√21 – √19) > (√23 – √21) D) (√21 – √19) > (√23 – √21) > (√19 – √17)

Answer & Explanation Answer: C) (√19 – √17) > (√21 – √19) > (√23 – √21)

Explanation: