7
Q:

# If the sum and diference of two numbers are 20 and 8 respectively, then the difference of their squares is :

 A) 120 B) 140 C) 160 D) 180

Explanation:

Let the numbers be x and y. Then, x + y = 20 and x - y = 8.

x^2 - y^2 = (x + y) (x - y) = 20 x 8 = 160.

Q:

10 Consecutive numbers are given. If the average of the two numbers given in the middle is 13.5, then what is the sum of the first 6 numbers?

 A) 65 B)  59 C) 69 D) 80

Explanation:

1 273
Q:

1.1 + 12.12 + 123.123 = ?

 A) 134.343 B) 133.433 C) 132.123 D) 136.343

Explanation:

1 221
Q:

Which of the following is in ascending order?

 A) 2/3, 3/4, 4/5, 1/2 B) 3/4, 4/5, 1/2, 2/3 C) 1/2, 2/3, 3/4, 4/5 D) 4/5, 1/2, 2/3, 3/4

Explanation:

0 218
Q:

Find the least number to be added to 1739 so that it is exactly divisible by 11.

 A) 11 B) 2 C) 1 D) 10

Explanation:

0 315
Q:

Which instrument is used for viewing the sun?

 A) Stroboscope B) Telescope C) Helioscope D) Sun meter

Explanation:

0 201
Q:

Which of the following is the least of all?

 A) 0.5 B) 1/0.5 C) 0.5 * 0.5 D) 0.5 * 2

Explanation:

0 200
Q:

If the sum of digits is 9 and the difference between the digit in the ten's place and unit's place is 1, then the two-digit number is?

 A) 45 B) 63 C) 54 D) 72

Explanation:

0 242
Q:

Which of the following numbers is composite?

 A) 47 B) 57 C) 37 D) 67